Cardiorespiratory fitness and socioeconomic influences in Chilean schoolchildren: a cross-sectional study Rodrigo Yáñez-Sepúlveda; Vicente Javier Clemente-Suárez; Josivaldo de Souza-Lima; Gerson Ferrari; Juan Hurtado-Almonacid; Juan Pablo Zavala-Crichton; Claudio Hinojosa-Torres; Tomás Reyes-Amigo; Jacqueline Páez-Herrera; Guillermo Cortés-Roco; Pedro Valdivia-Moral; Jorge Olivares-Arancibia; Sandra Mahecha-Matsudo;

Mental health difficulties and related factors in Chinese children and adolescents during the COVID-19 pandemic: a cross-sectional study Tongtong Li; Chunhao Li; Guoquan Zhang; Naijian Zhang; Jing Li; Qinghan Ren; Wen Li; Zhenshu Li; Guowei Huang; Jing Yan;

Multisystem inflammatory syndrome (MIS-C): a systematic review and meta-analysis of clinical characteristics, treatment, and outcomes Mônica O. Santos; Lucas C. Gonçalves; Paulo A.N. Silva; André L.E. Moreira; Célia R.M. Ito; Fernanda A.O. Peixoto; Isabela J. Wastowski; Lilian C. Carneiro; Melissa A.G. Avelino;