[1] Harvard Med Sch, Boston Childrens Dana Farber Canc & Blood Disorde, Boston, MA 02115 USA
[2] Texas Childrens Hosp, Baylor Coll Med, McGovern Med Sch, Houston, TX 77030 USA
[3] Harvard Med Sch, Beth Israel Deaconess Med Ctr, Boston, MA 02115 USA
[4] RAND Corp, Santa Monica, CA USA
[5] Harvard Med Sch, Natl Ctr Eth Hlth Care, Harvard TH Chan Sch Publ Hlth LS Lehmann, US Dept Vet Affairs, Boston, MA 02115 USA
[6] Univ Texas Hlth Sci Ctr Houston, Univ Texas Houston, Mem Hermann Ctr Healthcare Qual & Safety, McGovern Med Sch, Houston, TX 77030 USA
[7] Vanderbilt Univ, Med Ctr, Div Gen Internal Med, Nashville, TN USA
[8] Texas Childrens Hosp, Baylor Coll Med, Houston, TX 77030 USA