1. a Health Resources and Services Administration , Rockville , Maryland
2. b The Measurement Group , Culver City , Califomia
3. c Personalized Nursing Corporation , Ann Arbor , Michigan
4. d Couununity Research Branch, Division of Epidemiology an d Prevention, National Institute on Drug Ahuse , Rockville , Maryland
5. e Western Services Branch, Division of HIV Services, Health Resources and Services Administrat ion , Rockville , Maryland
6. f Desire Narcotics Rehabilitation, Inc. , New Orleans , Louisiana
7. g Clinical Medicine Branch, Division of Clinical Research, National Institute on Drug Abuse , Rockville , Maryland
8. h Washington University School of Medicine , St. Louis
9. i University of Colorado Medical Center , Denver
10. j Yale University School of Medicine , New Haven , Connecticut