anchor.diff:  "19259-1","Antigen (not B) by Latex agglutination","Neisseria meningitidis A+C+w135+Y Ag","Ord","Neisseria meningitidis"
   "193-3","Clindamycin susceptibility","Clindamycin","OrdQn",
   "20396-8","Levofloxacin susceptibility","Levofloxacin","OrdQn",
  -"20416-4","PCR/amplification","Hepatitis C virus RNA","Qn","Hepatitis C"
  -"20442-0","PCR/amplification","Hepatitis B virus DNA","Qn","Hepatitis B"
  +"20416-4","PCR/amplification","Hepatitis C virus RNA","Qn","Hepatitis C virus"
  +"20442-0","PCR/amplification","Hepatitis B virus DNA","Qn","Hepatitis B virus"
   "20449-5","Total Antibody","Borrelia burgdorferi Antibody","Ord","Borrelia burgdorferi"
   "20474-3","Culture","Bacteria identified","Nom",
   "20479-2","IgG Antibody","Measles virus Ab.IgG","Ord","Measles virus"
  
positive.code: "6579-7","Culture","Vibrio sp identified","Nom",
  "6581-3","Culture","Vibrio sp identified","Nom",
  "6584-7","Culture","Virus identified","Nom",
  "6585-4","Antigen by EIA/ELISA","Western equine encephalitis virus Ag","Ord","Western equine encephalomyelitis virus"
  "6586-2","Antigen by DFA/IF","Western equine encephalitis virus Ag","Ord","Western equine encephalomyelitis virus"
  "6587-0","Total Antibody","Yellow fever virus Antibody","Qn","Yellow Fever virus"
  "6588-8","Total Antibody","Yellow fever virus Antibody","Qn","Yellow Fever virus"
  "6589-6","Total Antibody","Yellow fever virus Antibody","Qn","Yellow Fever virus"
  
negative.code: "16898-9","65 Antigen by DFA/IF","Giardia lamblia 65 Ag","Ord","Giardia lamblia"
  "16899-7","Antigen by DFA/IF","Giardia lamblia Ag","Ord","Giardia lamblia"
  "16926-8",,"Haemophilus influenzae A Ag","Ord",
  "16936-7","IgG Antibody","Hepatitis C virus Ab.IgG","Qn","Hepatitis C virus"
  "17012-6",,"Influenza virus A Antibody","Qn",
  "17014-2",,"Influenza virus B Antibody","Qn",
  "17015-9",,"Influenza virus B Ab.IgG","Qn",
  