1. Electrophysiology and Pacing Unit, Humanitas Clinical and Research Hospital, IRCCS, Rozzano, Italy (M.G.)
2. University of Ottawa Heart Institute, ON, Canada (D.B.).
3. Lüdenscheid Clinic, Lüdenscheid, Germany (B.L.).
4. Tsukuba University Hospital, Ibaraki, Japan (K.A.).
5. The University of Hong Kong, China (K.L.-F.L.).
6. The University of Pittsburgh Medical Centre, PA (J.G.).
7. Maggiore Hospital, Crema, Italy (M.L.).
8. Medtronic plc, Mounds View, MN (R.K.).
9. Medtronic plc, Rome, Italy (S.M., M.C., A.G.).
10. Cleveland Clinic, OH (D.O.M.).