“…Table 1 describes the characteristics of the included studies. Studies were performed in various countries: five were conducted in the UK (56,58,63,65,66), four were from Canada (54,59,68,69), two were from the Netherlands (64,69) and the USA (55,70) and there was one trial each from Germany (57), Israel (61), New Zealand (60) and Norway (62).There was a range of study participants: nine studies included general practitioners or family practitioners (56-58, 60-63, 68, 69), three studies included physical therapists (59,64,65), two included chiropractors (54,55), and a single study included occupational therapists (67).…”