“…Four studies 37‐40 (17.4%) included patients with various cancer types, whereas 19 (82.6%) studies narrowed their sample by recruiting patients with either a specific cancer type 5,10,30‐36,41,43‐47,49,50 or in one case, a few specific types 42 . There were 12 cross‐sectional observational, 5,10,30,32,34,35,39‐42,44‐46,48 6 longitudinal, 5,31,36,39,43,49 2 mixed methods, 30,47 2 qualitative, 33,40 and 1 retrospective study 50 . Fifteen studies (65.2%) were conducted in the United States, 5,10,30,32‐34,39‐47 while 8 (34.8%) were international.…”