Amin, R., Dey, B. K., Abdulsalim, S., & Manu, M. K. (2021). Preparation and Validation of User-based Patients Information Leaflets (PILs) for COPD Patients in Indian Regional Languages: A Prospective Observational Study. International Journal of Pharmaceutical Investigation, 11(2), 244-247. https://doi.org/10.5530/ijpi.2021.2.43