“…In addition, CRF is also correlated with a high body mass index [8,9] and white blood cell count [8], increased limb volume [8], low levels of physical activity [8][9][10][11], higher tumor grade [9,[12][13][14][15], and sleep disturbances [12,14]. Because significant discrepancies exist among these studies (e.g., some studies show associations between sociodemographic data and fatigue [7,12], whereas others indicate the opposite [9,13]) and because most of this research (except for two studies) has been conducted in developed countries, the factors associated with CRF in developing countries remain ambiguous. Therefore, additional relevant research is warranted.…”