[Surveillance or therapy of precancerous conditions of the esophagus and gastrointestinal tract?].
D004938:Esophageal Neoplasms / Q000628:therapy*; D005770:Gastrointestinal Neoplasms / Q000628:therapy*; D006801:Humans; D011230:Precancerous Conditions / Q000628:therapy*
Kontrolle oder Therapie von Präkanzerosen im Osophagus und Gastrointestinaltrakt?