“…There was great variability in the size of the study sample from which the sample of people with serious mental illness. In two studies (28,32), the whole sample comprised eligible adult subjects with serious mental illness, whom were included in the synthesis of results, whilst other studies presented results for subsamples with serious mental illness from a Most studies were from the USA (13,24,(30)(31)(32)34,35,38) and Canada (29,36,43); the remaining studies were from Denmark (41,42), the UK (28,44), France (39), the Netherlands (25), Australia (27,33), New Zealand (23), Japan (40) and Taiwan (26,37). The mean/median age of subjects ranged between 47 and 79.…”