1 Department of Molecular Medicine, MERU-Roon Research Center on Vascular Biology, The Scripps Research Institute, La Jolla, CA, USA. ruggeri@scripps.edu.
2 Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA, USA. ruf@uni-mainz.de.
3 Center for Thrombosis and Hemostasis, Johannes Gutenberg University Medical Center, Mainz, Germany. ruf@uni-mainz.de.