Wagtmans, M J Clinical aspects of Crohn's disease of the upper gastrointestinal tract: a comparison with distal Crohn's disease. [electronic resource] - The American journal of gastroenterology Sep 1997 - 1467-71 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0002-9270 Subjects--Topical Terms: Abdominal Pain--diagnosisAdolescentAdultAge FactorsAge of OnsetChildChild, PreschoolColic--diagnosisColonic Diseases--diagnosisCrohn Disease--diagnosisDuodenal Diseases--diagnosisEndoscopy, GastrointestinalEsophageal Diseases--diagnosisFemaleFollow-Up StudiesGastrointestinal Diseases--diagnosisHumansIleal Diseases--diagnosisInfantJejunal Diseases--diagnosisMaleMiddle AgedMouth Diseases--diagnosisRectal Diseases--diagnosisStomach Diseases--diagnosisTime Factors