“…27,28 Fifteen out of 19 articles (n = 15) were observational studies: five retrospective cohort, 6,23,25,27,28 and 10 cross sectional studies (seven of which were survey/interview type studies). [11][12][13][14][15][16][17][18]22,24 Additionally, there were two experimental studies, 21,26 one systematic review, 19 and one audit. 20 Included articles were published between 2001 and 2016 from nine countries including USA (n = 5), Japan (n = 4), and UK (n = 3).…”