AU - Sponseller, Paul D. TI - Commentary on an article by Harry K.W. Kim, MD, MSc, FRCSC, et al.: “How Much Varus Is Optimal with Proximal Femoral Osteotomy to Preserve the Femoral Head in Legg-Calvé-Perthes Disease?” PT - JOUR DP - 2011 TA - The Journal of Bone & Joint Surgery PG - e14 1-2 VI - 93 IP - 4 AID - 10.2106/JBJS.J.01725 [doi] 4100 - http://dx.doi.org/10.2106/JBJS.J.01725 SO - The Journal of Bone & Joint Surgery February 16, 2011 93(4):e14 1