Derby CA, Araujo AB, Johannes CB, Feldman HA, McKinlay JB. Measurement of erectile dysfunction in population-based studies: the use of a single question self-assessment in the Massachusetts Male Aging Study. Int J Impot Res. 2000 Aug 1;12(4):197-204.
Burke GL, Anthony MS, Vitolins M. Dietary soy protein and lipids: a strategy for primary prevention of cardiovascular disease? Current opinion in endocrinology diabetes and obesity. 1996 Dec;3(6):508-13.