THE incidence of gastroesophageal reflux diseaseGERD)is high in Western nations.Its extrae-sophageal manifestations such as asthma,parox-ysmal laryngospasm,and excessive throat phlegm,chroniccough,laryngal disorders,postnasal drip,and other lesserear,nose THE incidence of gastroesophageal reflux disease GERD) is high in Western nations. Its extrae-sophageal manifestations such as asthma, parox-ysmal laryngospasm, and excessive throat phlegm, chronic cough, laryngal disorders, postnasal drip, and other lesserear, nose