Assessment tools for the measurement of the self-efficacy of drug users: protocol for a systematic review
Selene Cordeiro Vasconcelos, Iracema da Silva Frazão, Everton Botelho Sougey, Sandra Lopes de Souza, Tatiana de Paula Santana da Silva, Murilo Duarte da Costa Lima
BMJ Open Mar 2018, 8 (3) e019019; DOI: 10.1136/bmjopen-2017-019019