2450
22 . 6 % of patients were found to be positive at histology in the corpus mucosa ; all but one of these patients had elevated circulating IgG to H . pylori ( Group C ) .
 GENE: IgG
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: IgG