Posterior condylar bone resection and femoral implant thickness vary by up to 3 mm across implant systems: implications for flexion gap balancing. - Kahlenberg, Cynthia A.; Elmasry, Shady; Mayman, David J.; Cross, Michael B.; Wright, Timothy M.; Westrich, Geoffrey H.; Sculco, Peter K. (Knee Surgery, Sports Traumatology, Arthroscopy, 2019)