Meli, Laura, Alessia Bogi, Grazia Dal Maso, and Francesco Rosini. “Monotest in the Complement Fixation Test: The Chorus System”. Microbiologia Medica 24, no. 2 (June 30, 2009). Accessed May 26, 2020. https://www.pagepressjournals.org/index.php/mm/article/view/mm.2009.2536.