“…Chiropractic was reported in 17 studies [2, 30, 32, 34, 55, 58-60, 62, 66-68, 74, 82, 85, 86, 94], as 'chiropractic or osteopathy' in 1 study [41], as 1 of a group of CAMs in 4 studies [28,31,53,77], and as 'manual or manipulative treatments' in 2 studies [15,61]. Prevalence rates were 0.4-20.8%, user numbers 5-4,040,204 and sample sizes of 152-57,717,200.…”