[1] UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA
[2] HARVARD UNIV, SCH MED, BOSTON, MA 02115 USA
[3] FRANKLIN SQ HOSP, BALTIMORE, MD 21237 USA
[4] CUNY MT SINAI SCH MED, NEW YORK, NY 10029 USA
[5] SCH PUBL HLTH & COMMUNITY MED, SEATTLE, WA USA
[6] UNIV N CAROLINA, CHAPEL HILL, NC 27514 USA
[7] HARVARD UNIV, CAMBRIDGE, MA 02138 USA
[8] MAYO MED SCH, ROCHESTER, MN 55901 USA
[9] WOMENS HORMONE INFORMAT SERV, SHELBURNE, VT USA
[10] UNIV CALIF LOS ANGELES, LOS ANGELES, CA 90024 USA
[11] MEM HOSP GALVESTON CTY, GALVESTON, TX USA
[12] VET ADM HOSP, SEPULVEDA, CA 91343 USA
[13] COOK CTY HOSP, CHICAGO, IL 60612 USA