The lower esophageal sphincter and gastroesophageal competence.

• Author(s): Carvalhinhos, A ; Freire, A ; de Oliveira, A G ; Lopes, M J ; Novais, L ; Veloso, J ; Correia, J P
• Date: 1986
• Origin: Acta Médica Portuguesa
• Document Type: Article
• Language: Portuguese