Non-communicable diseases, sociodemographic vulnerability and the risk of mortality in hospitalised children and adolescents with COVID-19 in Brazil: a cross-sectional observational study - Sousa, Braian Lucas Aguiar; Brentani, Alexandra Valeria Maria; Ribeiro, Cecilia Claudia Costa; Dolhnikoff, Marisa; Grisi, Sandra Josefina Ferraz Ellero; Ferrer, Ana Paula Scoleze; Ferraro, Alexandre Archanjo (Bmj open, 2022)