They showed mean incidences as: 54.4, 51.7, and 52.0% for HC–DM; 49.0, 46.5 and 42.6% for HC–HD; 64.9, 58.2 and 69.6% for HC–HTN; and 49.6, 37.6 and 39.1% for HC–anemic Hb. The gene discussed is GSTM1; the disease is diabetes mellitus.