Additional file 1: of Perceived factors influencing the initiation of methamphetamine use among Akha and Lahu youths: a qualitative approach ChomchoeiChalitar ApidechkulTawatchai WongnuchPilasinee TamornparkRatipark UpalaPanupong NongkhaiMarisa 2019 A sixteen-question guideline. (DOCX 13 kb)