“…Studies varied in sample sizes, sex distributions, populations, assessment instruments, and study quality. Six studies were aimed at individuals with general chronic pain [40,41,51,52,56,57], nine studies at individuals with chronic lower back pain (LBP) [36,37,39,44,46,47,49,53,54], three studies at individuals with arthritis (e.g., osteoarthritis and rheumatoid arthritis) [43,45,55], and one study each at individuals with menstrual pain [48], frozen shoulder pain [38], chronic neck pain [42], and migraine [50]. Fifteen of the studies recruited patients during clinic visits or through their general practitioners (GP) [36][37][38][40][41][42][43][46][47][48]51,52,[55][56][57] or research institutions, and seven recruited participants from the community via the internet or flyers [39,44,45,49,50,53].…”