Cricopharyngeal peroral endoscopic myotomy improves oropharyngeal dysphagia in patients with Parkinson’s disease oleh Peter I. Wu, Michal M. Szczesniak, Taher Omari, Thomas Y. Lam, Marc Wong, Julia Maclean, Karen K. Ma, Anne Y. Chan, Vincent Mok, Ian J. Cook, Charles Cock, Joseph Sung, Justin Wu, Philip W. Chiu