[1] Univ Penn, Philadelphia, PA USA
[2] VA Boston Healthcare Syst, Boston, MA USA
[3] Case Western Reserve Univ, Cleveland, OH 44106 USA
[4] DVAHCS, Durham, England
[5] Vanderbilt Univ, Med Ctr, Nashville, TN USA
[6] Oregon Hlth & Sci Univ, Portland, OR 97201 USA
[7] VA Salt Lake City Hlth Care Syst, VA Informat & Comp Infrastruct, Salt Lake City, UT USA
[8] Massachusetts Gen Hosp, Boston, MA 02114 USA
[9] Partners, Boston, MA USA
[10] Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37235 USA
[11] Harvard Med Sch, Boston, MA 02115 USA
[12] Univ Calif San Diego, San Diego, CA 92103 USA
[13] Argon Natl Lab, Chicago, IL USA
[14] Yale Univ, New Haven, CT USA
[15] VA Philadelphia, Philadelphia, PA USA
[16] VA Palo Alto, Palo Alto, CA USA
[17] Brigham & Womens Hosp, 75 Francis St, Boston, MA 02115 USA