[1] Massachusetts Gen Hosp, Boston, MA 02114 USA
[2] Univ Texas Southwestern Med Ctr Dallas, Dallas, TX 75390 USA
[3] Univ Calif San Diego, La Jolla, CA 92093 USA
[4] Univ New Mexico, Albuquerque, NM 87131 USA
[5] Actel Pharmaceut Ltd, Allschwil, Switzerland
[6] Actel Pharmaceut US Inc, San Francisco, CA USA
[7] Univ Michigan, Ann Arbor, MI 48109 USA