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... Rogan,¹

Department of Human Genetics, Allegheny University of the Health Sciences, Pittsburgh, PA

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... ²

Correspondence should be addressed to: Peter K. Rogan, Ph.D., Department of Human Genetics, MCP-Hahnemann School of Medicine, Allegheny University of the Health Sciences, 320 E. North Ave., Pittsburgh, PA 15212; tel:(412) 359-4988; fax:(412) 359-6488; email: progan@pgh.allegheny.edu

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... Schneider³ Frederick Cancer Research and Development Center, P. O. Box B, Frederick, MD 21702-1201. fax: (301) 846-5598, email address: toms@alum.mit.edu

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