[1] Univ Oslo, Fac Med, Inst Hlth & Soc, Dept Hlth Management & Hlth Econ, POB 1089, N-0317 Oslo, Norway
[2] Yale Univ, Sch Med, Yale Canc Ctr, Canc Outcomes Publ Policy & Effectiveness Res COP, New Haven, CT USA
[3] Amsterdam UMC, Dept Epidemiol & Biostat, Amsterdam, Netherlands
[4] Link Med Res, Oslo, Norway
[5] Yale Sch Med, Sect Gen Internal Med, New Haven, CT USA
[6] Yale Sch Med, Dept Obstet Gynecol & Reprod Sci, New Haven, CT USA
[7] Yale Sch Publ Hlth, Dept Hlth Policy & Management, New Haven, CT USA
[8] NYU, Sch Med, Dept Populat Hlth, New York, NY USA