Symptom diagnosis: the use of two different mathematical models.
D001835:Body Weight; D002769:Cholelithiasis / Q000175:diagnosis; D003201:Computers; D003936:Diagnosis, Computer-Assisted; D004381:Duodenal Ulcer / Q000175:diagnosis; D005767:Gastrointestinal Diseases / Q000175:diagnosis*; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis; D006548:Hernia, Diaphragmatic / Q000175:diagnosis; D006801:Humans; D008297:Male; D008962:Models, Theoretical; D013276:Stomach Ulcer / Q000175:diagnosis