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;

Analysis of the prevalence and influencing factors of hyperuricemia in children and adolescents aged 6¿17 years in northeastern Sichuan Province Xuemei Guo; Ningting Xiao; Xueming Jing; Zhennan Zhu; Heping Zhang;