OPN1SW and chronic hepatitis B virus infection: In contrast, a study of chronic hepatitis B among Asian American patients found that the ALT levels were normal (genotype B or C), and there were no strong associations of ALT flares with any of the assessed clinical factors, which included an age ≧ 50, gender, ALT at biopsy ≧ 1/2 ULN, fibrosis stage > 1, inflammation grade > 1, HBV DNA ≧ 100000 IU/ml or ≧ 20000 IU/ml, HBeAg positivity, HBV PC mutation, HBV BCP mutation, all combinations of PC and BCP mutations, and genotypes B or C. However, this study of Asian Americans did not test qHBsAg [22].