“…The majority of the quantitative surveys (54; 76.1%) were administered by an interviewer [100,102,104–109,112,113,115–117,119,121–124,128–130,133–137,139,141–150,152–166,168,169], five (7.0%) were self-administered [125,126,132,140,151], one (1.4%) used an audio computer-assisted self-interview [110] and the remaining studies (11; 15.5%) did not specify or it was not clear how the survey was administered [101,103,111,114,118,120,127,131,138,167,170]. No studies indicated clearly that there was a free response option for participants to report the barriers they experienced (for further description on the studies see the supplementary material).…”