Esophageal pH MonitoringGastric Acidity DeterminationCapsulesCapsule EndoscopesGastric FistulaTelemetryMonitoring, AmbulatoryAvidinLeukocyte L1 Antigen ComplexGastroesophageal RefluxEsophagoscopyAvian ProteinsCell Adhesion Molecules, NeuronalHydrogen-Ion ConcentrationRetinaNerve Tissue ProteinsTime FactorsMolecular Sequence DataAmino Acid Sequence