A Taiwanese study of patients with lung, gastric, and pancreatic cancer and patients with lymphoma reported that either very low or very high BMI (male BMI ≤ 23.940 and > 31.259 kg/m2, female BMI ≤ 19.424 and > 31.538 kg/m2) and anemia (male Hb ≥ 8.785 and < 13.435 g/dL, female Hb ≥ 6.963 and < 11.737 g/dL), which differed by sex, were significant risk factors [29]. This evidence concerns the gene GSTM1 and anemia.