anchor.diff:  "47387-6","PCR/amplification","Neisseria gonorrhoeae DNA","Ord","Neisseria gonorrhoeae"
   "47405-6","IgG Antibody","Ehrlichia chaffeensis Ab.IgG","Qn","Ehrlichia chaffeensis"
   "47419-7","Total Antibody","Varicella zoster virus Antibody","Qn","Varicella-zoster virus"
  -"48159-8","Antibody signal/cutoff","Hepatitis C virus Ab Signal/Cutoff","Qn","Hepatitis C"
  +"48159-8","Antibody signal/cutoff","Hepatitis C virus Ab Signal/Cutoff","Qn","Hepatitis C virus"
   "48310-7","Culture","Influenza virus A","Ord","Influenza A"
   "48410-5","Western (immuno) blot IgM","Yersinia, IgM by Western Blot","Ord","Yersinia species"
   "48509-4","PCR/amplification","Influenza virus A+B RNA","Nom",
  
positive.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"
  "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"
  
negative.code: "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 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"
  