anchor.diff:  "14790-0","Identification","Helminth identified","Nom",
   "14974-0","PCR/amplification","Mycobacterium sp DNA","Ord","Mycobacterium tuberculosis complex"
   "16099-4","Ethionamide susceptibility","Ethionamide","OrdQn",
  -"16128-1","Total Antibody","Hepatitis C virus Ab","Ord","Hepatitis C"
  -"16129-9","IgG Antibody","Hepatitis C virus Ab.IgG","Ord","Hepatitis C"
  +"16128-1","Total Antibody","Hepatitis C virus Ab","Ord","Hepatitis C virus"
  +"16129-9","IgG Antibody","Hepatitis C virus Ab.IgG","Ord","Hepatitis C virus"
   "16133-1","IgM Antibody","Legionella pneumophila Ab.IgM","Qn","Legionella pneumophila"
   "16134-9","Culture","Neisseria meningitidis","Ord","Neisseria meningitidis"
   "16278-4","PCR/amplification","Mycobacterium tuberculosis DNA","Ord","Mycobacterium tuberculosis complex"
  
positive.code: "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"
  "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",
  
negative.code: "22312-3","Total Antibody","Hepatitis A virus Antibody","Qn","Hepatitis A virus (human enterovirus 72)"
  "22313-1","IgG Antibody","Hepatitis A virus Ab.IgG","Qn","Hepatitis A virus (human enterovirus 72)"
  "22314-9","IgM Antibody","Hepatitis A virus Ab.IgM","Ord","Hepatitis A virus (human enterovirus 72)"
  "22327-1","Total Antibody","Hepatitis C virus Antibody","Qn","Hepatitis C virus"
  "22365-1",,"Influenza virus A Antibody","Qn",
  "22367-7",,"Influenza virus B Antibody","Qn",
  "22382-6","IgM Antibody","Legionella pneumophila 1 Ab.IgM","Qn","Legionella pneumophila serogroup 1"
  