865
Hepatitis B surface antigen was detected in 2 patients , with negative hepatitis C virus antibody .
 GENE: Hepatitis B surface antigen; GENE: hepatitis C virus antibody
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: Hepatitis B surface antigen; GENE: hepatitis C virus antibody