[1] Fdn IRCCS Policlin S Matteo, Dept Cardiol, I-27100 Pavia, Italy
[2] Univ Pavia, Dept Lung Blood & Heart, Cardiol Sect, I-27100 Pavia, Italy
[3] Fdn IRCCS Policlin S Matteo, Mol Cardiol Lab, I-27100 Pavia, Italy
[4] IRCCS Ist Auxol, Lab Cardiovasc Genet, Milan, Italy
[5] Univ Stellenbosch, Dept Med, ZA-7505 Tygerberg, South Africa
[6] Univ Cape Town, Dept Med, Hatter Inst Cardiovasc Res, Cardiovasc Genet Lab, ZA-7925 Cape Town, South Africa