Khan, Ahmed Mushtaq, et al. “EFFECTIVENESS OF PIRANI SCORE IN PREDICTING SELECTION OF ACHILLES TENOTOMY IN IDIOPATHIC CLUBFOOT: A CASE CONTROL STUDY”. Pakistan Armed Forces Medical Journal, vol. 70, no. 5, Oct. 2020, pp. 1376-80, https://pafmj.org/PAFMJ/article/view/5567.