Low total testosterone is associated with increased risk of incident type 2 Diabetes mellitus in men: Results from the Study of Health in Pomerania (SHIP) - Schipf, S; Haring, R; Friedrich, N; Nauck, M; Lau, K; Alte, D; Stang, A; Völzke, H; Wallaschofski, H (Das Gesundheitswesen, 2010)