Nagaraju K, Karthik N, Porchelvan S, Rishi Jain, and Snehal Muchhala, “An open labelled prospective clinical study to evaluate the efficacy, safety and cost analysis of Pidotimod as add-on drug for maintenance therapy in Paediatric Recurrent Acute Respiratory tract Infections”, Int. J. Res. Pharm. Sci., vol. 11, no. 2, pp. 2183–2188, Apr. 2020.