Risk factors for functional dyspepsia, erosive and non-erosive gastroesophageal reflux disease: A cross-sectional study Antonio M. Caballero-Mateos; Javier L. López-Hidalgo; Úrsula Torres-Parejo; Juan M. Hernández-González; María Dolores Quintero-Fuentes; Antonio M. Caballero-Plasencia; Eduardo Redondo-Cerezo;