Men's comfort in distributing or receiving HIV self-test kits from close male social network members in Dar Es Salaam, Tanzania: baseline results from the STEP project. - Matovu JKB; Mbita G; Hamilton A; Mhando F; Sims WM; Thompson N; Komba AN; Lija J; Zhang J; van den Akker T; Duncan DT; Choko AT; et al. (BMC public health, 2021)