“…Of note, 10 trials recruited mainly cancer patients. Four of the trials were RCTs (Engelhardt et al, 2006; Temel et al, 2010, 2017; Radwany et al, 2014), nine were cohort studies (Rabow et al, 2004; O'Mahony et al, 2010; Lustbader et al, 2011; Sacco et al, 2013; Bailey et al, 2014; Kao et al, 2014; Kerr et al, 2014; Tan et al, 2014; Ferrell et al, 2015), and 13 were cross-sectional studies (Parker-Oliver et al, 2003; Buchanan et al, 2004; Sato et al, 2008; Nakano et al, 2012; De Gendt et al, 2013; Bhatraju et al, 2014; Alsirafy et al, 2015; Chen et al, 2015; Patel et al, 2016; Huang et al, 2017; McDonald et al, 2017; Omondi et al, 2017; Reinhardt et al, 2017).…”