In the article titled “Patient-Specific CT-Based Instrumentation versus Conventional Instrumentation in Total Knee Arthroplasty: A Prospective Randomized Controlled Study on Clinical Outcomes and In-Hospital Data” [1], an acknowledgment should be added as follows:

A very special gratitude goes to Professor Jarosław Deszczyński, Head of the Department of Orthopaedics and Rehabilitation, 2nd Faculty of Medicine, Medical University of Warsaw, for all help and sharing his pearls of wisdom.

We would also like to thank all our colleagues from Department of Orthopaedics and Rehabilitation, 2nd Faculty of Medicine, Medical University of Warsaw, who provided insight and expertise that assisted the research.

The results presented were part of the Ph.D. research partially supported by the Foundation for the Development of Fracture Stabilization Techniques “Dynastab”.