[1] Harvard Med Sch, Program Regulat Therapeut & Law, Boston, MA 02115 USA
[2] Univ Zurich Hosp, Med, Zurich, Switzerland
[3] Hosp Santa Creu & Sant Pau, Med Oncol, Barcelona, Spain
[4] Brigham & Womens Hosp, Dept Med Oncol, 75 Francis St, Boston, MA 02115 USA
[5] London Sch Econ, Hlth Policy, London, England