Residence of liquids in the infra-junctional portion of the proximal stomach in patients with gastroesophageal reflux disease - Barbieri, C. L. A.; Troncon, Luiz Ernesto de Almeida; Herculano Júnior, José Ruver Lima; Aprile, Lilian Rose Otoboni; Dantas, Roberto Oliveira (Brazilian Journal of Medical and Biological Research, 2005)