Altpeter, Ekkehardt S., and Axel J. Schmidt. “Surveillance of Tuberculosis in Switzerland and the Principality of Liechtenstein, 2009 to 2019”. Swiss Medical Weekly 151, no. 3536 (September 1, 2021): w30032. Accessed April 19, 2024. https://smw.ch/index.php/smw/article/view/3064.