Zhao, Y., Y.- hui Liu, S.- ge Mao, and X.- xin Zhang. “Evaluation of the Clinical Efficacy of 3D Printing technology Assisted Surgery Combined With Early Postoperative Comprehensive Rehabilitation in the Treatment of Senile Intertrochanteric Fractures”. Pakistan Journal of Medical Sciences, Vol. 37, no. 3, Mar. 2021, doi:10.12669/pjms.37.3.3988.