a. Hepatitis B: Serologic evidence of current or past Hepatitis B (HB) infection based on the results of testing for HBsAg and anti-hepatitis B core (HBc) as follows: i. Patients positive for HBsAg or HBcAb historically or on testing performed within one year of consent are excluded ii. Hepatitis C: Positive test for Hepatitis C antibody on testing performed within one year of consent.