Early and rapid growth of hepatitis C virus in relapsers but not in sustained responders revealed by very frequent sampling during followup: Jose Eymard M Medeiros-Filho, University of Sao Paulo School of Medicine, Sao-Paulo Brazil; Avidan U Neumann, Bar-Ilan Univ, Ramat-Gan Israel; Isabel M Mello, Adolfo Lutz Institute, Sao-Paulo Brazil; Rachel S Levy-Drummer, Bar-Ilan Univ, Ramat-Gan Israel; Luiz Caetano Da Silva, University of Sao Paulo School of Medicine, Sao-Paulo Brazil; Joao Renato R Pinho, Adolfo Lutz Institute, Sao-Paulo Brazil; Flair J Carrilho, University of Sao Paulo School of Medicine, Sao-Paulo Brazil