Jong, M. C.; Buskin, S. L.; Ilyenko, L.; Kholodova, I.; Burkart, J.; Weber, S.; Keller, T.; Klement, P. Effectiveness, Safety and Tolerability of a Complex Homeopathic Medicinal Product in the Prevention of Recurrent Acute Upper Respiratory Tract Infections in Children: A Multicenter, Open, Comparative, Randomized, Controlled Clinical Trial. Multidiscip Respir Med 2016, 11 (1). https://doi.org/10.4081/mrm.2016.313.