Concurrency is more complex than it seems.
Kretzschmar
Mirjam
M
White
Richard G
RG
Caraël
Michel
M
D017954:Africa South of the Sahara / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology* / Q000635:transmission; D015497:HIV-1; D006801:Humans; D008393:Marriage / Q000706:statistics & numerical data*; D012309:Risk-Taking; D012725:Sexual Behavior; D012747:Sexual Partners