Commutability and concordance of four hepatitis B virus DNA assays in an international multicenter study por Benjamin Maasoumy, Birgit Bremer, Patrick Lehmann, Ed G. Marins, Véronique Michel-Treil, Christian O. Simon, Merlin Njoya, Markus Cornberg, Ellen Paxinos, Michael P. Manns, Johannes Vermehren, Christoph Sarrazin, Ji Yeon Sohn, Yunjung Cho, Heiner Wedemeyer