[1] Denver Hlth Med Ctr, Denver, CO USA
[2] Denver VA Med Ctr, Denver, CO USA
[3] Duke Univ, Med Ctr, Durham, NC 27706 USA
[4] Johns Hopkins Univ, Bayview Med Ctr, Baltimore, MD 21218 USA
[5] Johns Hopkins Univ Hosp, Baltimore, MD 21287 USA
[6] LDS Hosp, Salt Lake City, UT USA
[7] McKay Dee Hosp, Ogden, UT USA
[8] Metrohlth Med Ctr, Cleveland, OH 44109 USA
[9] San Francisco Gen Hosp, Med Ctr, San Francisco, CA 94110 USA
[10] Thomas Jefferson Univ Hosp, Philadelphia, PA 19107 USA
[11] Univ Calif San Francisco, San Francisco, CA 94143 USA
[12] Univ Colorado, Hlth Sci Ctr, Boulder, CO 80309 USA
[13] Univ Maryland, College Pk, MD 20742 USA
[14] Univ Michigan, Ann Arbor, MI 48109 USA
[15] Univ Penn, Philadelphia, PA 19104 USA
[16] Univ Utah Hosp, Salt Lake City, UT 84112 USA
[17] Washington Univ, Harborview Med Ctr, St Louis, MO 63130 USA
[18] Utah Valley Reg Med Ctr, Provo, UT USA
[19] Vanderbilt Univ, Nashville, TN USA
[20] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Clin Coordinating Ctr, Cambridge, MA 02138 USA
[21] NHLBI, ARDS Clin Trials Network, NIH, Bethesda, MD USA
[22] Cleveland Clin Fdn, Cleveland, OH 44195 USA