Carlone, Stefano, Michele Minenna, Peride Morlino, Luigi Mosca, Franco Pasqua, Riccardo Pela, Pietro Schino, et al. “Clinical Efficacy and Tolerability of an Immune- Stimulant* Constituted by Inactivated Bacterial Bodies in the Prophylaxis of Infectious Episodes of Airways: A Double Blind, Placebo-Controlled, Randomized, Multicentre Study”. Multidisciplinary Respiratory Medicine 9, no. 1 (November 19, 2014). Accessed July 7, 2024. https://mrmjournal.org/index.php/mrm/article/view/393.