“…Because some cancers are associated with a particular sex, 2 studies notably recruited all-male participants [ 32 , 42 ], while another 10 studies recruited all-female participants [ 21 , 23 , 24 , 26 , 30 , 34 , 35 , 37 , 39 , 44 ]. Also, there was a range of different cancer topics targeted during the study interventions, including 9 studies for skin cancer [ 22 , 25 , 27 , 31 , 33 , 36 , 40 , 41 , 45 ], 2 for colorectal cancer [ 28 , 38 ], and 1 for lung cancer [ 29 ].…”