Latin American Surgical Outcomes Study in Paediatrics (LASOS-Peds): study protocol and statistical analysis plan for a multicentre international observational cohort study oleh Ludhmila Abrahão Hajjar, Bruce M Biccard, Clarisa Lauber, Faye Evans, Nivaldo Alonso, Alexandra Torborg, Alexandra Vieira, Vinícius Caldeira Quintão, Gabriel Soares de Sousa, Francesco Consonni, Samuel Rodrigues, Julia Proença, Ricardo Vieira Carlos, Marcella Clemente, Mariana Neville, Fernanda Leite, Cristiano Tonello, Annery Garcia-Marcinkiewicz, Rodrigo Guris, Jose Herrera, Ana Andersen, Lorena Schaigorodsky, Nanci Biondini, Ninón Cajas, Francisco Cruzat, Luis Ignacio Cortínez, Marisol Giraldo, Alioth Valle, Cristian Pozo, Ana Betancourt, Maria Alejandra Echeto, Alma Dominguez, Lina Sarmiento, Kenya González, Gesely Ábrego, Lorena Leguizamón, Leila Paula, Gabriela Lopez, Maria José Carmona