[1] Hannover Med Sch, D-3000 Hannover, Germany
[2] Duke Univ, Med Ctr, Durham, NC 27706 USA
[3] Vertex Pharmaceut, Cambridge, MA USA
[4] Weill Cornell Med Coll, New York, NY USA
[5] Harvard Univ, Beth Israel Deaconess Med Ctr, Sch Med, Boston, MA 02215 USA
[6] Univ Toronto, Toronto, ON, Canada
[7] Univ Frankfurt, Frankfurt, Germany
[8] Univ Amsterdam, Acad Med Ctr, NL-1105 AZ Amsterdam, Netherlands
[9] Univ Calif San Francisco, San Francisco, CA 94143 USA
[10] St Louis Univ, Sch Med, St Louis, MO USA