[1] Univ Washington, Dept Family Med, Seattle, WA 98195 USA
[2] Emory Univ, Sch Med, Dept Pediat, Childrens Healthcare Atlanta, Atlanta, GA USA
[3] Stanford Univ, Sch Med, Div Cardiovasc Med, Palo Alto, CA 94304 USA
[4] Midwest Heart Fdn, Oak Brook Terrace, IL USA
[5] Inst Sport Med & Sci, Dept Med, Rome, Italy
[6] Univ Washington, Div Cardiol, Seattle, WA 98195 USA
[7] Univ Zurich Hosp, Div Cardiol, CH-8091 Zurich, Switzerland
[8] St Georges Univ London, Dept Cardivasc Sci, London, England
[9] Qatar Orthoped & Sports Med Hosp, ASPETAR, Dept Sports Med, Doha, Qatar
[10] Mayo Clin, Dept Med, Div Cardiovasc Dis, Rochester, MN USA
[11] Mayo Clin, Dept Med, Dept Pediat Cardiol, Rochester, MN USA
[12] Mayo Clin, Dept Pediat, Rochester, MN USA
[13] Mayo Clin, Dept Mol Pharmacol & Expt Therapeut, Rochester, MN USA
[14] Univ Connecticut, Dept Athlet, Storrs, CT USA
[15] Eisenhower Army Med Ctr, Dept Family Med, Ft Gordon, GA USA
[16] Massachusetts Gen Hosp, Div Cardiol, Boston, MA 02114 USA
[17] Karolinska Univ Hosp, Swedish Sch Sports & Hlth Sci, Dept Cardiol, Stockholm, Sweden
[18] Mayo Clin, Div Cardiovasc Dis, Rochester, MN USA
[19] Univ Padua, Dept Cardiac Thorac & Vasc Sci, Padua, Italy
[20] Univ Calif Los Angeles, Div Sports Med, Los Angeles, CA USA
[21] Univ Louvain, Dept Cardiovasc Sci, Louvain, Belgium
[22] Univ Arizona, Dept Family & Community Med, Tucson, AZ USA
[23] Seattle Childrens Hosp, Div Cardiol, Seattle, WA USA
[24] Hosp Clin Porto Alegre, Dept Cardiol, Porto Alegre, RS, Brazil
[25] Childrens Hosp Philadelphia, Div Cardiol, Philadelphia, PA 19104 USA