[1] Univ Texas Southwestern, Baylor Univ, Med Ctr, Hepatol Div,Dept Med, Dallas, TX USA
[2] Stanford Univ, Dept Med, Div Gastroenterol & Hepatol, Palo Alto, CA 94304 USA
[3] Hepatitis B Fdn, Doylestown, PA USA
[4] Case Western Reserve Univ, Dept Med, Div Gastroenterol & Hepatol, Case & VA Med Ctr, Cleveland, OH 44106 USA