1Department of Pediatrics and Human Development, Michigan State University, East Lansing, Michigan 48824, ²Department of Pathology, Medical College of Ohio, Toledo, Ohio

Received 2/2/98 Accepted 2/6/98
Send correspondence to:

James E. Trosko, Ph.D.
Michigan State University
Department of Pediatrics and Human Development
240 NFSTC Bldg., East Lansing, Michigan 48824

Tel: (517) 353-6346
Fax: (517) 432-6340
E-mail: trosko@pilot.msu.edu