10 studies
Gray
I, IIIa, IIIb, IV
PWID, drug treatment, drug use, opioids, pregnancy, sexual partners, transmission
Australia, Europe, Malaysia, Taiwan, United States
7 studies
Gray
I, II, IIIa, IIIb, V
condom use, counseling, sex behavior, sexual partners, support, support groups, treatment, violence
Ethiopia, Nigeria, Rwanda, South Africa, Uganda, United States, Zambia