1 Division of Cardiothoracic Surgery, Washington University, Barnes Jewish Hospital, Campus Box 8234, 660Euclid Avenue, St Louis, MO 63110-1093. Electronic address: jamesedgertonmd@gmail.com.
2 Department of Statistical Sciences, Southern Methodist University, Dallas, TX; Robbins Institute for Health Policy & Leadership, Baylor University, Waco, TX.
3 Baylor Scott & White Research Institute, Dallas, TX.
4 Baylor Scott & White Research Institute, Dallas, TX; The Heart Hospital Baylor Plano, Plano, TX.