Sylvain Choquet, Ralf Trappe, Veronique Leblond, Ulrich Jäger, Frederic Davi, Stephan Oertel. CHOP-21 for the treatment of post-transplant lymphoproliferative disorders following solid organ transplantation. Haematologica 2007;92(2):273-274; https://doi.org/10.3324/haematol.10595.