a1 Division of Viral Hepatitis, Centers for Disease Control and Prevention, Atlanta, GA, USA
(Accepted August 13 2008)
(Online publication September 17 2008)
Key Words:
Correspondence:
c1 Author for correspondence: Dr C. G. Teo, Division of Viral Hepatitis, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333, USA. (Email: enz0@cdc.gov)