1. Environmental & Occupational Health Surveillance Program; New Jersey Department of Health; Trenton New Jersey
2. Occupational Health Surveillance Program; Massachusetts Department of Public Health; Boston Massachusetts
3. Occupational Health Branch; California Department of Public Health; Richmond California
4. Public Health Institute; Contractor to California Department of Public Health; Richmond California
5. Division of Occupational and Environmental Medicine; Michigan State University; East Lansing Michigan
6. Division of Respiratory Disease Studies; National Institute for Occupational Safety and Health; Centers for Disease Control and Prevention; Morgantown West Virginia
7. University of Pittsburgh Graduate School of Public Health; Department of Epidemiology; Pittsburgh Pennsylvania