“…We also found 2 studies provided data on liver cancer, oral cavity cancer (Akhtar et al, 2011;Jaleel et al, 2012), endometrial cancer (Xu et al, 2011;Yuzhalin et al, 2012), bronchogenic cancer (AIRD et al, 1954;Roots et al, 1988), melanoma (Xie et al, 2010;de Giorgi et al, 2011), and leukemia (MACMAHON et al, 1958;Newell et al, 1974). Moreover, 1 study were found for each of the following cancer sites: biliary (Gong et al, 2012), other gynaecological (KROKFORS et al, 1954), tongue (Hartmann et al, 1964), lip (Hartmann et al, 1964), Burkitt's tumour (Williams et al, 1966), glioma (Gong et al, 2012), brain (Pearce et al, 1965), central nervous (Akhtar et al, 2011), salivary gland (OSBORNE et al, 1962), thyroid (Gong et al, 2012), bladder (Llopis et al, 1990), kidney (Joh et al, 2012), bone (Akhtar et al, 2011), mesothelioma (Utkan et al, 2013), and multiple cancer unspecified (Holley et al, 1966). The blood groups were detected using routine clinical tests in most of the studies, and only seven studies acquired the information from blood bank records or questionnaires.…”