Silva, A., S. Tan, A. Tay, H. Nee Pang, N. Nung Lo, and S. Jin Yeo. “Risk Factors for a Post-Operative Neutrally Aligned Total Knee Arthroplasty in the Sagittal Plane Developing Fixed Flexion Deformity at 2 Years Follow up Study”. International Journal of Research in Orthopaedics, vol. 5, no. 2, Feb. 2019, pp. 211-5, doi:10.18203/issn.2455-4510.IntJResOrthop20190792.