Prevalence of constipation in cystic fibrosis patients: a systematic review of observational studies Marina A. Stefano; Rosana E. Poderoso; Jochen G. Mainz; Jose D. Ribeiro; Antonio F. Ribeiro; Elizete Aparecida Lomazi;

Prevalence and impact of asthma in schoolchildren in the city of Caxias do Sul-RS Daniel Zacaron; Cristian Roncada; Rossano Sartori Dal Molin; Marcus Herbert Jones; Paulo Condessa Pitrez;

Prevalence, mortality and risk factors associated with very low birth weight preterm infants: an analysis of 33 years Julia Damiani Victora; Mariangela Freitas Silveira; Cristian Tedesco Tonial; Cesar Gomes Victora; Fernando Celso Barros; Bernardo Lessa Horta; Iná Silva dos Santos; Diego Garcia Bassani; Pedro Celiny R. Garcia; Marola Scheeren; Humberto H. Fiori;