Evaluating a Markov chain analysis.
D000368:Aged; D005743:Gastrectomy; D006801:Humans; D008297:Male; D008390:Markov Chains; D008875:Middle Aged; D008954:Models, Biological; D010437:Peptic Ulcer / Q000150:complications / Q000601:surgery; D011336:Probability; D013274:Stomach Neoplasms / Q000453:epidemiology* / Q000209:etiology