[1] IRCCS Fdn Policlin S Matteo, Dept Cardiol, I-27100 Pavia, Italy
[2] Univ Pavia, Dept Mol Med, Cardiol Sect, I-27100 Pavia, Italy
[3] Univ Cape Town, Dept Med, Hatter Inst Cardiovasc Res Africa, Cardiovasc Genet Lab, ZA-7700 Rondebosch, South Africa
[4] King Saud Univ, Coll Med, Dept Family & Community Med, Chair Sudden Death, Riyadh 11461, Saudi Arabia
[5] Helmholtz Zentrum Munich, Inst Human Genet, Neuherberg, Germany