Gastroesophageal RefluxBile RefluxDuodenogastric RefluxVesico-Ureteral RefluxEsophagitis, PepticEsophagusLaryngopharyngeal RefluxEsophageal pH MonitoringHeartburnManometryEsophagitisVenous InsufficiencyHernia, HiatalEsophagoscopyProton Pump InhibitorsEsophagogastric JunctionFundoplicationBarrett EsophagusGastric Acidity DeterminationAntacidsGastric AcidVaricose VeinsHydrogen-Ion ConcentrationOmeprazoleAnti-Ulcer AgentsPeristalsisEndoscopy, GastrointestinalLaryngitis2-PyridinylmethylsulfinylbenzimidazolesEsophageal Sphincter, LowerCisaprideUltrasonography, Doppler, DuplexEructation