[1] Univ Penn, Wharton Sch Business, Philadelphia, PA 19104 USA
[2] Amgen Europe GmbH, Zug, Switzerland
[3] Univ Penn, Ctr Clin Epidemiol & Biostat, Philadelphia, PA 19104 USA
[4] Amgen Inc, Zurich, Switzerland
[5] Imperial Coll London, London, England
[6] Fdn Hipercolesterolemia Familiar, Madrid, Spain
[7] Hop La Pitie Salpetriere, Inst Cardio Metab & Nutr ICAN, Dept Endocrinol & Cardiovasc Dis Prevent, Paris, France