Factors associated with participation in HIV case management intervention among Russian drug users. (1st November 2015) - Toussova, Olga; Cheng, Debbie M.; Blokhina, Elena; Bridden, Carly; Gnatienko, Natalia; Quinn, Emily; Raj, Anita; Kiriazova, Tetiana K.; Lunze, Karsten; Walley, Alexander Y.; Krupitsky, Evgeny; Samet, Jeffrey