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Background:Dysphagiaisacommoncomplicationofstroke.ItismainlycausedbyPseudobulbarpalsyandseldomcausedbyactualbulbarparalysis.Manydysphagiapatientscan'teatbymouthanddependonnasalfeedingcompletely,whichisdisadvantageoustopatients'rehabilitation.Soitisimporta