Clinical characteristics and mortality risk factors in patients aged less than 18 years with COVID-19 in Mexico and Mexico City Rosa María Wong-Chew; Daniel Ernesto Noyola; Antonio Rafael Villa;

Epidemiology and risk factors for bronchopulmonary dysplasia in preterm infants born at or less than 32 weeks of gestation Andrea Sucasas Alonso; Sonia Pértega Diaz; Rebeca Sáez Soto; Alejandro Avila-Alvarez;

Relationship between modifiable risk factors and overweight in adolescents aged 12¿14 years María Isabel Jiménez Candel; Pedro J. Carpena Lucas; Guillermo Ceballos-Santamaría; José Mondéjar Jiménez; Ana Belén Monreal Tomás; Victoria Eugenia Lozano Pastor;