1. From Perelman School of Medicine at the University of Pennsylvania (H.C.H.) and Lankenau Heart Institute (B.R.), Philadelphia, Allegheny General Hospital, Allegheny Health Network, Pittsburgh (S. Bailey), and the University of Pittsburgh Medical Center, Harrisburg (H.G.) — all in Pennsylvania; Icahn School of Medicine at Mount Sinai, New York (R.M.); Leeds Teaching Hospitals, Leeds, United Kingdom (D.J.B.); St. Johannes Hospital Dortmund, Dortmund (H.M.), Heart Center Leipzig at University of...