1. a National Center for Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC 27711.
2. b Integrated Laboratory Systems, Inc., NIEHS EC-17, P.O. Box 12233, Research Triangle Park, NC 27709; Tel (voice): 919-316-4930, Tel(fax): 919-541-0947; strickl2@niehs.nih.gov
3. c The Boeing Company, P.O. Box 3707, Seattle, WA 98124