“…Of the 73 included acceptability studies, the majority were set in the USA (42 studies 107,108,161,175,176,482,492,504,505,510,515,526,533,621, ). The remainder were in Canada (four studies 170,[658][659][660][661] ), the UK (14 studies 145,169,481,511,538,[662][663][664][665][666][667][668][669][670] ) and elsewhere in Europe: the Netherlands (three studies 497,671,672 ), Norway (three studies [673][674][675] ) and Sweden (one study 676 ), with one multisite review of services 145,146,640,[665][666][667][668][669]…”