Govindaraj, S., Santhakumaran, P., & Thirumalaikumarasamy, S. (2017). Evaluation of persistent pneumonia and percutaneous needle aspiration of lung as a tool in the etiological evaluation of children with persistent pneumonia. International Journal of Contemporary Pediatrics, 4(5), 1694–1700. https://doi.org/10.18203/2349-3291.ijcp20173768