“…2 . There is an intermediate group including diseases of the circulatory system (N = 9) [65] , [66] , [67] , [68] , [69] , [70] , [71] , [72] , [73] , diseases of the musculoskeletal system (N = 8) [74] , [75] , [76] , [77] , [78] , [79] , [80] , [81] , diseases of the digestive system (N = 7) [82] , [83] , [84] , [85] , [86] , [87] , [88] and the nervous system (N = 7) [89] , [90] , [91] , [92] , [93] , [94] , [95] . There are a few reviews focused on other categories such as diseases of respiratory system (N = 4) [96] , [97] , [98] , [99] , visual system (N = 3) [100] , [101] , [102] and the other chapters include only one or two systematic reviews [103] , [104] , [105] , [106] , [107] , [108] , [109] , [110] , [111] , [112] , [113] , [114] , [115] , [116] .…”