1. Department of Immunology, Tufts University School of Medicine, Boston, MA (P.A., R.E.).
2. Department of Biomedical Sciences, Humanitas University, Milan, Italy (M.K.).
3. Adaptive Immunity Laboratory, IRCCS Humanitas Research Hospital, Milan, Italy (M.K.).
4. Division of Cardiology, Department of Medicine, Washington University School of Medicine, Saint Louis, MO (S.D.P.).