Perfusion magnetic resonance imaging correlates with the duration of stages and lateral pillar class in Legg-Calvé-Perthes disease by Wudbhav N. Sankar, MD, Julianna Lee, BA, David Chong, MD, Yasmin D. Hailer, MD, PhD, Luiz R. Agrizzi de Angeli, MD, Scott Yang, MD, Jennifer Laine, MD, Harry K.W. Kim, MD

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