anchor.diff:  "32705-6","PCR/amplification","Neisseria gonorrhoeae DNA","Ord","Neisseria gonorrhoeae"
   "33295-7","PCR/amplification","JC virus DNA","Ord","Jamestown Canyon virus"
   "33327-8","Total Antibody","Varicella zoster virus Antibody","Qn","Varicella-zoster virus"
  -"33463-1","e IgG Antibody","Hepatitis B virus little e Ab.IgG","Ord","Hepatitis B"
  +"33463-1","e IgG Antibody","Hepatitis B virus little e Ab.IgG","Ord","Hepatitis B virus"
   "33510-9","IgM Antibody","Coccidioides immitis, Ab.IgM","Ord","Coccidioides immitis"
   "33581-0","Total Antibody","Anaplasma phagocytophilum Antibody","Qn","Anaplasma phagocytophilum"
   "33633-9","Precore Tag mutation by PCR","Hepatitis B virus precore TAG mutation","Nom",
  
positive.code: "23833-7","Antibody index","Borrelia burgdorferi Ab index","Ord","Borrelia burgdorferi"
  "23867-5","IgG Antibody","Hantavirus sin nombre Ab.IgG","Qn","Hantavirus (sin nombre)"
  "23868-3","IgM Antibody","Hantavirus sin nombre Ab.IgM","Qn","Hantavirus (sin nombre)"
  "23869-1","DNA probe - not amplified/PCR","Hepatitis B virus DNA","Qn","Hepatitis B"
  "23870-9","Western (immuno) blot (100+5-1-1 Ab only)","Hepatitis C virus 100+5-1-1 Antibody","Ord","Hepatitis C"
  "23871-7","Western (immuno) blot (NS5 Ab only)","Hepatitis C virus NS5 Antibody","Ord","Hepatitis C"
  "23877-4","IgG Antibody","Anaplasma phagocytophilum Ab.IgG","Qn","Anaplasma phagocytophilum"
  "23878-2","IgM Antibody","Anaplasma phagocytophilum Ab.IgM","Qn","Anaplasma phagocytophilum"
  "23908-7","DNA probe - not amplified/PCR","Neisseria gonorrhoeae rRNA","Ord","Neisseria gonorrhoeae"
  
negative.code: "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 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"
  