Swallowing transit times and valleculae residue in stable chronic obstructive pulmonary disease - Chaves, Rosane de Deus; Sassi, Fernanda Chiarion; Mangilli, Laura Davison; Jayanthi, Shri; Cukier, Alberto; Zilberstein, Bruno; Andrade, Claudia Furquim de (BMC Pulmonary Medicine, 2014)