Concurrent drug use among methadone maintenance patients in mountainous areas in northern Vietnam
Bach Xuan Tran, Victoria L Boggiano, Huong Lan Thi Nguyen, Long Hoang Nguyen, Hung Van Nguyen, Canh Dinh Hoang, Huong Thi Le, Tho Dinh Tran, Hai Quan Le, Carl A Latkin, Thuc Minh Thi Vu, Melvyn WB Zhang, Roger CM Ho
BMJ Open Mar 2018, 8 (3) e015875; DOI: 10.1136/bmjopen-2017-015875