All

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 C02 Virus Diseases D014777 +
  C02.782 RNA Virus Infections D012327 +
   C02.782.815 Retroviridae Infections D012192 +
    C02.782.815.616 Lentivirus Infections D016180 +
     C02.782.815.616.400 HIV Infections D015658 +
      C02.782.815.616.400.500 HIV Seropositivity D006679 
 C02 Virus Diseases D014777 +
  C02.800 Sexually Transmitted Diseases D012749 +
   C02.800.801 Sexually Transmitted Diseases, Viral D015229 +
    C02.800.801.400 HIV Infections D015658 +
     C02.800.801.400.500 HIV Seropositivity D006679 
 C20 Immunologic Diseases D007154 +
  C20.673 Immunologic Deficiency Syndromes D007153 +
   C20.673.480 HIV Infections D015658 +
    C20.673.480.500 HIV Seropositivity D006679