1. Heufelder AE, Leinung MC, Northcutt RC (1992) Holiday gynecomastia. Ann Intern Med 116:877 Letter
2. Lippens C, Ardies P, Van Steen A (1990) Pseudogynecomastia. J Belge Radiol 73:528–529
3. Behre HM, Yeung CH, Holstein AF, Weinbauer GF, Gassner P, Nieschlag E (2000) Diagnosis of male infertility and hypogonadism. In: Nieschlag E, Behre HM (eds) Andrology: male reproductive health and dysfunction, 2nd edn. Springer, Heidelberg, pp 90–124
4. Santen RJ (2006) Gynecomastia. In: Degroot LJ, Jameson JL (eds) Endocrinology, 5th edn. WB Saunders, Philadelphia, pp 3283–3293
5. Narula HS, Carlson HE (2007) Gynecomastia. Endocrinol Metab Clin N Am 36:497–519