“…Moreover, one study each originated from Brazil, Bulgaria, Canada, France, Great Britain, and Norway. Twenty-nine studies [6-8,12,19-21,25-27,30-36,38-47,49,51,52] used interviews, six were case studies [14,22,28,29,45,53], one used interviews and focus groups [9], and eight [10,11,13,23,24,37,48,50] used interviews supported by a questionnaire. For the eight studies that used both interviews and questionnaires, we relied on the qualitative results generated from the interviews.…”