1. Central Michigan University College of Medicine Saginaw Michigan USA
2. Hepatitis B Foundation Doylestown Pennsylvania USA
3. Division of Gastroenterology and Hepatology Veterans Affairs Palo Alto Healthcare System Palo Alto California USA
4. Division of Gastroenterology and Hepatology Stanford University School of Medicine Stanford California USA
5. Tuberculosis Section, Division of Communicable Disease Control and Prevention Alameda County Public Health Department San Leandro California USA