[1] Univ Colorado, Sch Med, Denver, CO USA
[2] NYU Winthrop Hosp, Mineola, NY USA
[3] Ohio State Univ, Coll Med, Columbus, OH 43210 USA
[4] Univ Southern Calif, Keck Sch Med, Los Angeles, CA USA
[5] Oregon Hlth & Sci Univ, Portland, OR 97201 USA
[6] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[7] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA