Jong, M. C., Buskin, S. L., Ilyenko, L., Kholodova, I., Burkart, J., Weber, S., Keller, T., & Klement, P. (2016). 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. Multidisciplinary Respiratory Medicine, 11(1). https://doi.org/10.4081/mrm.2016.313