Response to Letter Regarding Article, "Plasmin Cleavage of von Willebrand Factor as an Emergency Bypass for ADAMTS13 Deficiency in Thrombotic Microangiopathy". Issue 2 (13th January 2015) - Tersteeg, Claudia; de Maat, Steven; De Meyer, Simon F.; Smeets, Michel W.J.; Barendrecht, Arjan D.; Roest, Mark; Pasterkamp, Gerard; Fijnheer, Rob; Vanhoorelbeke, Karen; de Groot, Philip. G.; Maas, Coen