Prevalence and factors associated with bullying: differences between the roles of bullies and victims of bullying Georgia Rodrigues Reis e Silva; Maria Luiza Carvalho de Lima; Raquel Moura Lins Acioli; Alice Kelly Barreira;

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;

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;