Appendectomy is an independent protective factor for ulcerative colitis: results of a multicentre case control study. The Italian Group for the Study of the Colon and Rectum (GISC).
Physiologic estradiol replacement therapy and cardiac structure and function in normal postmenopausal women: a randomized, double-blind, placebo-controlled, crossover trial.
Classification of normogonadotropic infertility: polycystic ovaries diagnosed by ultrasound versus endocrine characteristics of polycystic ovary syndrome.