Frischknecht, F, H Brühwiler, W Sell, and I Trummer. “Serological Testing for Infectious Diseases in Pregnant Women: Are the Guidelines Followed?”. Swiss Medical Weekly 141, no. 0102 (January 3, 2011): w13138. Accessed May 1, 2024. https://smw.ch/index.php/smw/article/view/1236.