[1] Hosp Univ Penn, 3400 Spruce St, Philadelphia, PA 19104 USA
[2] Yale Sch Med, New Haven, CT USA
[3] Univ Penn, Philadelphia, PA 19104 USA
[4] Yale New Haven Hosp, 20 York St, New Haven, CT 06504 USA
[5] Yale Univ, New Haven, CT USA
[6] Yale Univ, Sch Med, New Haven, CT USA
[7] Cardiovasc Res Fdn, New York, NY USA
[8] Sahlgrens Univ Hosp, Dept Cardiol, Gothenburg, Sweden
[9] Univ Glasgow, British Heart Fdn, Glasgow Cardiovasc Res Ctr, Glasgow, Lanark, Scotland
[10] Univ Penn, Haddonfield, NJ USA
[11] Yale Sch Med, San Francisco, CA USA
[12] Penn Med, Philadelphia, PA USA