[1] Boston Univ, Boston, MA 02215 USA
[2] Brown Univ, Providence, RI 02912 USA
[3] Charles R Drew Univ, Los Angeles, CA USA
[4] Denver Hlth Med Ctr, Denver, CO USA
[5] Emory Univ, Atlanta, GA 30322 USA
[6] Howard Univ, Washington, DC 20059 USA
[7] Tufts Univ, Medford, MA 02155 USA
[8] Univ Calif San Diego, La Jolla, CA 92093 USA
[9] Univ Connecticut, Ctr Hlth, Farmington, CT 06269 USA
[10] Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Camden, NJ 08103 USA
[11] Univ Michigan, Ann Arbor, MI 48109 USA
[12] Univ New Mexico, Albuquerque, NM 87131 USA
[13] Univ So Calif, Los Angeles, CA 90089 USA
[14] Univ Virginia, Charlottesville, VA 22903 USA
[15] Yale Univ, New Haven, CT 06520 USA