[1] Mayo Clin, Div Nephrol & Hypertens, Rochester, MN USA
[2] Queen Elizabeth Hosp, Dept Cardiovasc Serv, Bridgetown, Barbados
[3] Mayo Clin, Dept Hlth Sci Res, Div Epidemiol, Rochester, MI USA
[4] Mayo Clin, Dept Neurol, Rochester, MI USA
[5] Mayo Clin, Dept Hlth Sci Res, Div Biomed Stat & Informat, Rochester, MN USA
[6] Mayo Clin, Dept Surg, Dept Physiol & Biomed Engn, Rochester, MN USA
[7] Mayo Clin, Div Maternal Fetal Med, Rochester, MN USA