Dr. Shiyas KP and Dr. Gopi Mohan 2017. Factors Affecting Peak Expiratory Flow Rates in Children of 9–12 Years of Age. Pediatric Review: International Journal of Pediatric Research. 4, 11 (Nov. 2017), 651-656. DOI:https://doi.org/10.17511/ijpr.2017.i11.04.