[1] Medstar Georgetown Univ Hosp, Medstar Washington Hosp Ctr, Washington, DC 20007 USA
[2] Brown Alpert Med Sch, Providence, RI USA
[3] Staten Isl Univ Hosp, Staten Isl, NY USA
[4] Univ Kentucky, Lexington, KY USA
[5] SUNY Stony Brook, Stony Brook, NY 11794 USA
[6] Louisiana State Univ, Hlth Sci Ctr, New Orleans, LA USA
[7] Inova Fairfax Hosp, Fairfax, VA USA