[1] Duke Clin Res Inst, Durham, NC USA
[2] Pharmasset, Princeton, NJ USA
[3] Roche, Palo Alto, CA USA
[4] Quest Clin Res, San Francisco, CA USA
[5] Univ Penn, Philadelphia, PA 19104 USA
[6] Cornell Univ, Weill Med Coll, New York, NY 10021 USA
[7] Univ Colorado, Aurora, CO USA
[8] Univ Florida, Gainesville, FL USA
[9] Orlando Immunol Ctr, Orlando, FL USA
[10] Auckland Clin Studies Ltd, Auckland, New Zealand
[11] Fundac Invest Diego, Santurce, PR USA