The value of measurment of gastrointestinal transit time by simplified radiopaque marker method in diagnosing dysdefecation in children

 
  • 簡(jiǎn)化不透射線(xiàn)標記物胃腸通過(guò)時(shí)間測定評價(jià)兒童排便障礙的價(jià)值
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