Look-back investigation follow-up.
Danila
R N
RN
MacDonald
K L
KL
Osterholm
M T
MT
D005194:Family Practice; D005500:Follow-Up Studies; D015658:HIV Infections / Q000453:epidemiology / Q000635:transmission*; D006801:Humans; D017757:Infectious Disease Transmission, Professional-to-Patient; D012307:Risk Factors