“…The systematic search conducted on November 12, 2018 yielded 3013 unique titles, from which 81 full texts were screened. Nine studies, eight peer-reviewed publications and one doctoral dissertation, involving 9749 participants were included ( Chao et al, 2015 , DiClemente et al, 2015 , Joseph et al, 2016 , Kim, 2017 , Lee et al, 2018 , Parra-Medina et al, 2015 , Reiter et al, 2018 , Richman et al, 2016 , Winer et al, 2016 ). For the doctoral dissertation, the full text was obtained through email contact with the author ( Kim, 2017 ), after screening a related conference abstract returned in the systematic search ( Kim et al, 2018 ).…”