“…In summary, all studies were published between 1972 and 2020, of which 24 studies 24,26–30,32,35–37,43,48–50,53,55–57,60,62,63,65,67,70,71 were published after December 2017. Most of the studies were conducted in the United States ( N = 27), 27,34‐38,41–44,46,50,52–61,66,70–72 Netherlands ( N = 8), 26,29,30,39,45,67,68 Germany ( N = 3) 33,64,65 and Canada ( N = 3) 28,47,51 . Studies were most often performed among mixed cancer patients ( N = 20) 27–29,33,36–38,41,44,47,50,53,54,61–64,66,68,70 and breast cancer patients ( N = 11) 32,34,38,45,49,52,59,60,63,65,71 .…”