Many people make significant and continuing contributions to the development of SAS software products. The following are some of those who have contributed significant amounts of their time to help us make improvements to SAS/Genetics software. This includes research and consulting, testing, or reviewing documentation. We are grateful for the involvement of these members of the statistical community and the many others who are not mentioned here for their feedback, suggestions, and consulting.

Peter Boyd		GlaxoSmithKline
Cynthia Coffman		Duke University School of Medicine
Margaret G. Ehm		GlaxoSmithKline
Greg Gibson		North Carolina State University
Shizue Izumi		Radiation Effects Research Foundation
Bret Musser		Merck
Dahlia Nielsen		North Carolina State University
Bruce S. Weir		University of Washington
Dmitri Zaykin		NIEHS

The simulated GAW12 data used in this book are supported by NIGMS grant GM31575.

The final responsibility for the SAS System lies with SAS alone. We hope that you will always let us know your opinions about the SAS System and its documentation. It is through your participation that SAS software is continuously improved.

Please enter your comments at Feedback at http://www.sas.com/statistics/.