[1] Royal Brompton Hosp, London SW3 6LY, England
[2] Univ St Andrews, St Andrews KY16 9AJ, Fife, Scotland
[3] McMaster Univ, Hamilton, ON L8S 4L8, Canada
[4] Summa Hlth Syst, Akron, OH USA
[5] GlaxoSmithKline, Harlow, Essex, England
[6] GlaxoSmithKline, Dallas, TX USA
[7] Grant Riverside Methodist Hosp, Columbus, OH USA
[8] SUNY Buffalo, Buffalo, NY 14260 USA