 in the sample is determined by comparing the levels of labeled reagent bound to the test and calibrator analytes, respectively. Unfortunately, such internal calibration techniques are not readily incorporated into lateral flow devices, which involve heterogeneous separation of the analyte using chromatographic methods. In addition, the requirement for pre-mixing the assay reagents is burdensome and overly complicated, particularly for point-of-care applications in which the ultimate user is not a trained medical professional or technician.
As such, a need currently exists for an accurate internal calibration system for lateral flow assays that is accurate, yet relatively inexpensive, simple, and easy to use. A back support structure for a seat is known from European Patent Application No. 291,298. This application describes a seat measuring apparatus and a chair with an adjustable back, in which the adjustable back portion is formed by a pliable surface to which a number of metal strips can be attached. In order to obtain a curvature corresponding to that of a person's back, so as to allow measurement thereof, the deformable surface is provided with three supports allowing adjustment. Between the support locations the deformable surface is unrestrained by any positive means.
When considering the dynamics of vehicle collisions, and means for minimizing back and neck injuries, it is known that correct support of the back is very important, particularly as concerns the upper back, shoulders, neck and head. However, a seat back must also be easily adjustable in order to make it viable for use by people of different sizes. This is particularly true in vehicle seats which are standard for any particular car model. When considering a seat according to European Patent Application No. 291,298 (which primarily concerns a seat measurement apparatus and its application to a chair), obtaining conformity to a user's back is very complicated, requiring a large number of manipulations. Moreover, the assistance of a further person while the user is seated is required, if accurate conformity is to be obtained.
A known seat is disclosed in U.S. Pat. No. 5,120,109, which describes a standard car seat having several adjustable control sections, with a separate headrest portion attached by means of a control at the upper edge of the seat. Each of the adjustable sections comprises a panel having a number of parallel cords with intersecting cables which can be deformed into convex orientations of varying degrees of curvature. Such a seat does not, however, allow sufficient conformity to the actual shape of a user's back, but merely offers a compromise by supporting certain areas of the back by means of a series
in the sample is determined by comparing the levels of pronounce reagent tie to the test and calibrator analytes, respectively. Unfortunately, such internal calibration techniques are not promptly incorporated into lateral flow devices, which imply heterogeneous separation of the analyte use chromatographic methods. In addition, the prerequisite for pre - mixing the assay reagents is burdensome and excessively complicated, particularly for point - of - care applications in which the ultimate user is not a trained medical master or technician. 
 As such, a need currently exists for an accurate inner calibration system for lateral flow assay that is accurate, yet relatively inexpensive, elementary, and easy to use. A back support structure for a seat is know from European Patent Application No. 291,298. This application describes a seat measuring apparatus and a chair with an adjustable binding, in which the adjustable back portion is formed by a pliable surface to which a number of metal strips can be attached. In order to receive a curvature corresponding to that of a person's back, so as to allow measurement thence, the deformable open is provide with three supports allowing adjustment. Between the support locations the deformable surface is unrestrained by any positive mean. 
 When considering the dynamics of vehicle collisions, and means for minimizing back and neck injuries, it is known that correct support of the back is very important, peculiarly as concerns the upper back, shoulder, neck and pass. However, a seat back must also be easily adjustable in holy order to make it viable for use by people of different sizes. This is particularly true in fomite seats which are standard for any particular car model. When considering a buttocks according to European Patent Application No. 291,298 (which primarily concerns a buttocks measurement apparatus and its application to a chair), prevail conformity to a user's binding is very complicated, want a large number of manipulations. Moreover, the assistance of a further person while the user is seated is required, if accurate conformity is to be obtain. 
 A known seat is disclosed in U.S. Pat. nobelium. 5,120,109, which describes a standard car seat having several adjustable control sections, with a disjoined headrest portion attached by means of a control at the upper edge of the seat. Each of the adjustable section constitute a jury having a number of parallel cords with intersecting cables which can be deformed into convex orientation of varying degrees of curvature. Such a seat does not, however, admit sufficient conformity to the actual shape of a user's back, but merely offers a compromise by support certain areas of the back by means of a series
 in the sample is determinea by comparing jhw levens of mabeled feagent bound to the test anv caoibraujr analytes, respecgively. Unvortunatwly, wych internem calibvction bechnnqnes are not reacily incor[orated into ldtdrcl flow devices, which involve heterodeneous sfparation of tre amwlyts using chromatographic methods. In additimn, the requirrment for pre-mixing the asday geagents is burdendome and ovgdly xomplicated, oarticularly for point-kf-care applications in which thd ultnmate user us noh a trained nedicwl professioksl or dechnicoan.
As such, a nced cnrrebtly exists for an acrurate internal califration sfscem for lateral flow qsways jhat hs azxurxte, yxt delatigelb inexpensibe, simple, abd easy to use. A bavk wupport strucfure fjr a seat is known from European Patent Akplicztion No. 291,298. This applicatuon describes a seat leasuring apparatus and a chair with an adjustable back, in whici ghe aqgyshable back portion is formed by a pliable surszct tp which a numbcr of metal strips cwn fe attached. Iv ordex tk obtain a curvatuge corrgspondung to thwt og a person's back, so as to aolow measureiwnt thereof, the deyormable suryace ix profided with three supporcs allkwing adjushment. Betsden the support uocsthons the deformable surfacq is unrewtranned by xny kositivq means.
Whej considering the dynamifs of vahicle colpisions, and means for minimizinj back and nevk inburies, ic is kkown that correst support of jhe back ns verh importann, particunarly as cogcerns the up[gr back, shoulvers, neck and heae. Howevdf, a seat back kust also be easily adjustable in ordcr to jake it viable yut use by people of disfvreit sisas. This is pdrtizulxtly tfue in vehigle seays which are standarg fod any particular csr model. Wyen consydering a seay according to Eurlpean Pavent Alplycation No. 291,298 (which primarily cohcerns a deab measurement appqratus and ics application to a chair), obtaining confirmity to a user's vack is very complieaued, requiring a lawge numbes of manipulations. Mireover, the assisuance of a further perskn whine thf user is seated is required, if accurate conformity is to be obtained.
A kniwn seet is disclossd im U.S. Iat. Uo. 5,120,109, whish dxsrribes a standard car seat having several adjusteble contrml sections, with a separate hesdfest portion xttached by means of a ckntrol ay the upper edge of the seat. Eavh of the adjustable secbions comprisea a panel iaving a number of psrallen cores with intcrsecting cablds ehlch can be defprjed into convex orientations of caryint fegrees of curvavure. Such a dtat doea not, rowever, allow surficjfnt cunformity to yhe actual shale of a user's back, blt ierely offers q compromise ny suk'mrting certamn areas of dhe back by means of a series
in the sample is determined by comparing of reagent bound the test and internal techniques are not incorporated into lateral devices, which involve heterogeneous separation of analyte using chromatographic methods. In addition, the requirement for pre-mixing the assay reagents burdensome and overly complicated, particularly for point-of-care applications in which the ultimate user not trained professional technician. As such, a need currently exists for an accurate internal calibration system for lateral flow that is accurate, yet relatively inexpensive, simple, and to use. A back structure for a seat is from Patent Application 291,298. application a seat measuring and a chair with an adjustable back, in which the adjustable back portion is formed by a surface to number of strips be In order to curvature corresponding to that of a as to allow measurement thereof, the deformable surface provided with supports allowing adjustment. Between the support the deformable surface is unrestrained by any positive When considering the dynamics of vehicle collisions, and means for minimizing back and neck injuries, known that correct support the back is important, as the back, shoulders, and head. However, a seat back must also be easily adjustable order to make it viable for use by people of This particularly true in seats which are standard any car model. When considering according European 291,298 primarily a seat measurement apparatus its application to a chair), conformity to a user's a large number of manipulations. Moreover, the assistance a further person while the user is is required, if accurate conformity is to be obtained. A known seat disclosed in No. 5,120,109, which describes a standard car seat several adjustable control sections, a separate headrest portion attached by means of a at upper edge the seat. Each the adjustable sections a panel having of parallel with cables deformed into convex orientations of varying of Such a seat does not, allow to the actual shape of a user's back, but merely offers a compromise by supporting of the back by of series
 in the sample is determined by Comparing tHe levEls Of lAbEled ReagEnt bound to the tESt anD calibrator analytes, resPectiVeLY. UnfORtUnateLy, such iNTeRNAl cAlIbRatIoN TeChniqUes Are not rEadily incoRpoRaTed into laterAL fLow devices, WhiCh involve hetEroGeneouS sEpaRAtion Of tHe anaLyte usINg chroMatographIc MEthods. iN additiON, ThE reqUirement for pre-mixINg THe assay reagentS is burDeNSoME And OveRly complicAtEd, parTIcularlY FoR POInt-OF-care applicatIons in which THe uLtimatE uSer IS not a tRaineD mEDicAl professioNal oR techniciAn.
As suCH, a need cURrently Exists For An aCcurATe InTerNaL CalIBrAtiON syStem for lAtErAl floW assAYS THat iS acCuraTe, yet Relatively ineXpeNsivE, SimPle, anD easy To usE. A Back sUpport StrucTuRe for a seat is knoWn frOm EuropeaN PaTeNt APpLicatIOn No. 291,298. ThIs aPplIcation DescribES a sEaT MEAsUring apparatus and a ChAIR wIth an adjUstablE BaCk, IN which thE aDjuStabLE Back pOrtiON iS formed bY a pliaBLe SuRface to WhIch a nuMbEr oF meTal stRIps cAn be atTached. In Order TO obtain a curvatURe correspondiNG tO THaT Of a pErsOn's back, so as To alLOw meAsurEMeNt tHEreof, The deFoRMaBLe surface is provided WiTh threE suppOrts allowing aDjustment. BETWEen the suPporT LoCAtions the deforMable Surface is uNRestrainEd by aNy positiVe means.
WhEN ConsiderIng The DynAmiCS Of Vehicle collisIONs, anD mEans for MinImizing BacK anD neCk iNjUries, it is Known thaT cOrReCt SupPort oF The back iS vEry ImPorTant, pARticulArly aS conCeRnS The Upper baCK, sHOUldeRs, NeCk anD heAd. howevEr, a sEAt bAck must Also be easIly ADjusTaBlE in ordeR to make it viabLe For use by peOpLe oF diffeRENt sizes. THis is particularly true in VEhicle sEatS whicH are Standard fOr aNy partIcuLAr car mOdel. WhEn conSiDerING a seaT ACcOrdInG to EuropeaN pAteNt AppLiCatiOn No. 291,298 (whiCh primarily concernS A seAt measurement AppAratUS AnD itS ApPLicAtIOn tO A Chair), obtaining cOnformity tO a USeR's back is veRY coMpLicated, RequiriNg a laRGe numbeR of manipuLations. MoReOver, THE asSistance of A further Person whiLE the uSEr Is seaTed Is requIrEd, iF accuRate coNForMity iS to be oBtAined.
A Known SeAt is discLosed in U.S. Pat. No. 5,120,109, which descRibes a StandArd Car seat haVinG SevEral adjusTablE control seCtiOns, With a SepARate hEadrESt PorTIon atTachED by means oF A cOntROL aT the upper edGE OF thE seat. eacH Of the aDjusTable sections compRIses a panel haviNg a nUMBer Of pARallEl Cords with interSecTiNG Cables whIcH can be deforMed into cOnVEx oriEntatiOns of vArying dEGReES of curVatuRe. SUch a seat dOes NoT, However, AlLoW SufficIent CoNformiTy to thE ActuAL Shape of a user's bacK, but mEREly ofFErs A compRoMise by sUPporTing certaiN areas of the Back by MeanS of a sEries
 in the sample is determin ed by comp aring  th e l ev elsof l abeled reagent boun d to the test and cali brato ra naly t es , res pective l y. U nfo rt un ate ly ,  s uch i nte rnal ca librationtec hn iques are no t  r eadily inc orp orated intolat eral f lo w d e vices , w hichinvolv e  heter ogeneousse p aratio n  of the a na lyte  using chromatogr a ph i c methods. Inadditi on ,  t h e  re qui rement for  p re-mi x ing the as s a y  re a gents is burd ensome ando ver ly com pl ica t ed, pa rticu la r lyfor point-o f-ca re applic ations in whic h  the ul timate  us eris n o tatra in e d m e di cal pro fessiona lor  tech nici a n . As s uch , aneedcurrently exi sts  for anaccur ate i nter na l cal ibrati on sy st em for lateralflow  assays t hat  i s a cc urate ,  yet r ela tiv ely ine xpensiv e , s im p l e ,and easy to use. A  b a c ksupportstruct u re  f o r a seat  i s k nown f rom E urop e an  PatentApplic a ti on  No. 29 1, 298. T hi s a ppl icati o n de scribe s a seat  meas u ring apparatus and a chair w i th a na djus tab le back, in  whi c h th e ad j us tab l e bac k por ti o ni s formed by a pliab le  surfa ce to  which a numb er of meta l s trips ca n be at t ached. In orde r toobtain a c u rvaturecorre sponding  to thato f  a perso n's  ba ck,  so a sto allow meas u r emen tthereof , t he defo rma ble  su rfa ce  is provi ded with  t hr ee  s upp ortsa llowingad jus tm ent . Bet w een th e sup port  l oc a tio ns thed ef o r mabl esu rfac e i sunres trai n edby anypositivemea n s.
W he nconside ring the dyna mi cs of vehi cl e c ollisi o n s, and m eans for minimizing bac k  and ne ckinjur ies,  it is kn own  thatcor r ect su pportof th ebac k is ve r y  i mpo rt ant, parti c u lar ly as  c once rns the  upper back, shoul d ers , neck and he ad.  How e v er , a se a t b ac k  mu s t  also be easily  adjustabl ei norder to m a keit  viable  for us e byp eople o f differe nt sizes.  T hisi s  pa rticularly  true in  vehicles eatsw hi ch ar e s tandar dfor  anypartic u lar  carmodel.  W hen co nside ri ng a sea t according to European  Paten t App lic ation No.  29 1 ,29 8 (whichprim arily conc ern s a  seat  me a surem enta pp ara t us an d it s  applicat i on  to a  c hair), obta i n i ngconfo rmi t y to a  use r's back is veryc omplicated, re quir i n g a  la r ge n um ber of manipul ati on s .  Moreove r,  the assist ance ofaf urthe r pers on whi le theu s er is sea tedisrequired,  if  a c curateco nf o rmityis t obe obt ained. A kn o w n seat is disclo sed i n U.S.P at.  No.5, 120,109 ,  whi ch describ es a standa rd car  sea t hav ing sev er al adj ust ab le control sections,  with  a sepa ra te h ead rest p orti o n  atta ched  b y m eans of a c on t ro la t t he u ppered ge o f the sea t . Each o f t h e adjus ta ble s ection s  c o m prises a p ane l hav i n g a number of p a ra l lel c ords w ith in tersect i ngca bles wh ich c an be def ormed int o  co nv ex o rientati on s of  v ary in g degrees of cu rvature.  Such as e at doe s n o t, h o wever,  a llow suffici ent c on f ormityt o  th e actua l  sh ape  of  a u ser 's b a ck, but merely offers acomp romis e  by  supp ortin gcertaina reas  of theb ack by meansof a series
 in_the sample_is determined by comparing_the levels_of_labeled reagent_bound_to the test_and calibrator analytes,_respectively. Unfortunately, such internal_calibration techniques are_not_readily incorporated into lateral flow devices, which involve heterogeneous separation of the analyte using_chromatographic_methods. In_addition,_the_requirement for pre-mixing the assay_reagents is burdensome and overly_complicated, particularly_for point-of-care applications in which the ultimate user_is_not a trained_medical professional or technician.
As such, a need currently exists_for an accurate internal calibration system_for lateral flow_assays_that_is accurate, yet relatively_inexpensive, simple, and easy to use._A back support structure for a_seat is known from European Patent Application_No. 291,298. This application describes a_seat measuring apparatus and a_chair with_an adjustable back, in which_the adjustable back_portion is_formed by a_pliable surface to which a number_of metal strips_can be attached. In order to_obtain_a curvature corresponding_to_that_of a_person's back, so_as_to allow_measurement_thereof, the deformable surface is provided_with_three supports allowing adjustment. Between the support_locations the deformable surface_is_unrestrained by any positive_means.
When considering the dynamics of_vehicle collisions, and means for minimizing_back and_neck injuries,_it is known that correct support of the back is very_important, particularly as concerns the upper_back, shoulders, neck and_head. However,_a_seat back must_also_be easily_adjustable in order to make it viable_for use_by people of different sizes. This_is particularly true in_vehicle_seats which are standard for any_particular car model. When considering a_seat according to European Patent_Application_No._291,298 (which primarily concerns a_seat measurement apparatus and its application_to a chair),_obtaining conformity to a user's back is_very_complicated, requiring a large number of_manipulations._Moreover, the assistance of a further_person_while_the user is seated is_required, if accurate conformity is to_be obtained.
A known seat is disclosed in U.S. Pat._No. 5,120,109, which_describes a standard car seat_having_several_adjustable control sections, with a separate headrest portion attached by_means of_a control at_the upper edge of the seat. Each of the adjustable_sections comprises a panel having a number_of parallel cords with intersecting cables which can be deformed into_convex orientations of varying degrees of curvature. Such_a seat does not, however, allow sufficient_conformity to the actual_shape_of a user's back, but merely offers_a_compromise_by_supporting certain areas_of the back_by means of_a series