[1] Medica Res Inst, MR CW105,POB 9310, Minneapolis, MN 55440 USA
[2] Univ Minnesota, Div Hlth Policy & Management, Sch Publ Hlth, 420 Delaware St SE, Minneapolis, MN 55455 USA
[3] Univ Minnesota, Dept Pediat, Sch Med, 2450 Riverside Ave, Minneapolis, MN 55454 USA
[4] Mayo Clin, Dept Hlth Sci Res, 200 First St SW, Rochester, MN 55905 USA
[5] Univ Texas Southwestern Med Ctr Dallas, Dept Clin Sci, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
[6] Texas Scottish Rite Hosp Children, 2222 Welborn St, Dallas, TX 75219 USA
[7] Univ Texas Southwestern Med Ctr Dallas, Dept Pediat, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
[8] Princeton Univ, Woodrow Wilson Sch Publ & Int Affairs, 316 Wallace Hall, Princeton, NJ 08544 USA
[9] Texas Hlth & Human Serv Commiss, Ctr Strateg Decis Support, 4900 N Lamar, Austin, TX 78751 USA
[10] Univ Texas Southwestern Med Ctr Dallas, 5323 Harry Hines Blvd, Dallas, TX 75390 USA
[11] Univ Texas Southwestern Med Ctr Dallas, Dept Clin Sci, 5323 Harry Hines Blvd, Dallas, TX 75390 USA