Family income per capita, age, and smoking status are predictors of low fiber intake in residents of São Paulo, Brazil - Santos, Paula Victória Félix dos; Sales, Cristiane Hermes; Vieira, Diva Aliete dos Santos; Fontanelli, Mariane de Mello; Marchioni, Dirce Maria Lobo; Fisberg, Regina Mara (Nutrition Research, 2016)