Zhang, Chao, Xu Guo, Yao Xu, Xiuxin Han, Xin Wang, and Guowen Wang. 2019. “Lung Metastases at the Initial Diagnosis of High-Grade Osteosarcoma: Prevalence, Risk Factors and Prognostic Factors. A Large Population-Based Cohort Study”. São Paulo Medical Journal 137 (5):423-29. https://periodicosapm.emnuvens.com.br/spmj/article/view/923.