Richert, L, and A Trombetti. “Age and Gender Distribution of Primary Hyperparathyroidism and Incidence of Surgical Treatment in a European Country With a Particularly High Life Expectancy”. Swiss Medical Weekly 139, no. 2728 (July 11, 2009): 400–404. Accessed May 7, 2024. https://smw.ch/index.php/smw/article/view/997.