“…The sample sizes ranged from 18 (40) to 358 (39) . The average age of participants ranged from 51•5 (42) to 72•0 years (52) . Studies included participants diagnosed with gastrointestinal (n 3) (39,49,52) , breast (n 3) (41,46,54) , undefined (n 3) (40,42,53) , head and neck (n 2) (43,44,50) , lung (n 2) (45,46) , colorectal (n 2) (49,51) and ovarian (n 2) (46,48) cancer.…”