1. Jennifer C. Duke, PhD; Jane Appleyard Allen, MA; and Haijun Xiao, MS, are with the American Legacy Foundation, Washington, DC. Linda L. Pederson, PhD, is with the Morehouse School of Medicine, Atlanta, Georgia. Paul D. Mowery, MA, is with Biostatistics, Atlanta, Georgia. James D. Sargent, PhD, is with Dartmouth Medical School, Lebanon, New Hampshire