anchor.diff:  "6932-8","Penicillin susceptibility","Penicillin","OrdQn",
   "693-2","Culture","Neisseria gonorrhoeae","Ord","Neisseria gonorrhoeae"
   "694-0","Culture","Neisseria gonorrhoeae","Ord","Neisseria gonorrhoeae"
  -"6957-5","IgG Antibody","Western equine encephalitis virus Ab.IgG","Qn","Western equine encephallomyelitis virus"
  +"6957-5","IgG Antibody","Western equine encephalitis virus Ab.IgG","Qn","Western equine encephalomyelitis virus"
   "695-7","Culture","Neisseria gonorrhoeae","Ord","Neisseria gonorrhoeae"
  -"6958-3","IgM Antibody","Western equine encephalitis virus Ab.IgM","Qn","Western equine encephallomyelitis virus"
  +"6958-3","IgM Antibody","Western equine encephalitis virus Ab.IgM","Qn","Western equine encephalomyelitis virus"
   "6959-1","O3 Antibody","Yersinia enterocolitica O3 Antibody","Qn","Yersinia enterocolitica serogroup O:3"
   "6960-9","O5 Antibody","Yersinia enterocolitica O5 Antibody","Qn","Yersinia enterocolitica serogroup O:5"
   "6961-7","O8 Antibody","Yersinia enterocolitica O8 Antibody","Qn","Yersinia enterocolitica serogroup O:8"
  
positive.code: "676-7","Microscopy","Microscopic observation","Nom",
  "678-3","Microscopy","Microscopic observation","Nom",
  "680-9","Microscopy","Microscopic observation","Nom",
  "6812-2","IgM Antibody","Dengue virus Ab.IgM","Qn","Dengue virus (includes types 1-4)"
  "688-2","Culture","Neisseria gonorrhoeae","Ord","Neisseria gonorrhoeae"
  "690-8","Culture","Neisseria gonorrhoeae","Ord","Neisseria gonorrhoeae"
  "6911-2","IgG Antibody","Brucella abortus Ab.IgG","Qn","Brucella abortus"
  
negative.code: "8041-6","MHA-TP (Microhemagluttination assay)","Treponema pallidum Antibody","Ord","Treponema pallidum"
  "8042-4","Total Antibody","Trichinella spiralis Antibody","Qn","Trichinella spiralis"
  "8043-2","IgG Antibody","Trichinella spiralis Ab.IgG","Ord","Trichinella spiralis"
  "8046-5","Total Antibody","Varicella zoster virus Antibody","Qn","Varicella-zoster virus"
  "8048-1","IgM Antibody","Varicella zoster virus Ab.IgM","Qn","Varicella-zoster virus"
  "8049-9","PCR/amplification","Varicella zoster virus DNA","Ord","Varicella-zoster virus"
  "8052-3","IgG Antibody","Western equine encephalitis virus Ab.IgG","Qn","Western equine encephalomyelitis virus"
  "8053-1","IgM Antibody","Western equine encephalitis virus Ab.IgM","Qn","Western equine encephalomyelitis virus"
  "8054-9","Total Antibody","Yellow fever virus Antibody","Qn","Yellow Fever virus"
  "8055-6","IgG Antibody","Yellow fever virus Ab.IgG","Qn","Yellow Fever virus"
  "8056-4","IgM Antibody","Yellow fever virus Ab.IgM","Qn","Yellow Fever virus"
  "8057-2","PCR/amplification","Yellow fever virus RNA","Ord","Yellow Fever virus"
  "9314-6","Total Antibody","Western equine encephalitis virus Antibody","Qn","Western equine encephalomyelitis virus"
  "9315-3","IgG Antibody","Western equine encephalitis virus Ab.IgG","Qn","Western equine encephalomyelitis virus"
  "9316-1","IgM Antibody","Western equine encephalitis virus Ab.IgM","Qn","Western equine encephalomyelitis virus"
  "9362-5",,"Bordetella pertussis Ab.IgA","Qn",
  "9364-1",,"Bordetella pertussis Ab.IgM","Qn",
  "9526-5","Antigen by EIA/ELISA","Hepatitis D virus Ag","OrdQn","Hepatitis D virus"
  