[1] Univ Calif San Diego, VA Healthcare Syst, San Diego, CA 92161 USA
[2] Univ Michigan, Ann Arbor, MI 48109 USA
[3] Univ Calif Los Angeles, Los Angeles, CA USA
[4] Rochester Gen Hlth Syst, Rochester, NY USA
[5] Boston Univ, Med Ctr, Boston, MA USA
[6] NYU, Sch Med, New York, NY USA
[7] VA Med Ctr, New York, NY USA
[8] Oklahoma Med Res Fdn, Oklahoma City, OK 73104 USA
[9] Hosp Univ Cruces, Vizcaya, Spain
[10] Univ Otago, Wellington, New Zealand
[11] Univ Paris Diderot, Sorbonne Paris Cite, Paris, France
[12] Hop Lariboisiere, F-75475 Paris, France
[13] Univ Alabama Birmingham, Birmingham, AL USA
[14] VA Med Ctr, Birmingham, AL USA
[15] Univ Auckland, Auckland 1, New Zealand
[16] Emory Univ, Atlanta, GA 30322 USA
[17] Univ Michigan Hlth Syst, Chelsea, MI USA
[18] Vet Affairs Med Ctr, Washington, DC 20422 USA
[19] N Mississippi Med Ctr, Tupelo, MS USA
[20] So Calif Permanente Med Grp, Downey, CA USA
[21] Univ Florida, Gainesville, FL USA
[22] Cleveland Clin, Cleveland, OH 44106 USA
[23] Univ Penn, Philadelphia, PA 19104 USA
[24] VA Med Ctr, Philadelphia, PA USA
[25] Harvard Vanguard Med Associates Atrius Hlth, Somerville, MA USA