Many individuals, groups, organizations, and communities contributed to this Compendium. We are most grateful to those who participated in the research studies. They trusted that their time and effort in a study would increase our understanding about ways to prevent HIV/AIDS. We hope this document confirms their trust and supports their prevention goals.

Similarly, we thank the researchers who designed the interventions and carried out the studies. In the course of writing this document, we spoke with many of the original researchers. Their contact information throughout the Compendium underscores their continued commitment to HIV/AIDS prevention.

For the selection of effective interventions by applying consistent criteria, thanks to John Anderson, Wayne D. Johnson, Linda Kay, Mary Neumann, Salaam Semaan, and Ellen Sogolow of the Centers for Disease Control and Prevention (CDC); Don Des Jarlais of Beth Israel Medical Center; and Larry Hedges of the University of Chicago. For reviews of drafts and comments that improved the final document, thanks to Amy DeGroff, Nikki Economou, Michele Evering-Watley, Dorothy Gunther, Lynn Meinor, John Peppert, Lauretta Pinckney, Tamara Sloan-Anderson, Kathy Stark, Chris Tullier, Duane Wilkerson, and Mary Willingham.

Special acknowledgments go to the project leadership and staff of CDC's contractor, Aspen Systems Corporation, particularly Ruthann Bates, Meredith Hart, Kevin Hylton, Maryann Krayer, Paula Lipman, Sarah McClanahan, and Darcy Strouse. At CDC, special thanks to Bobbie Person and Linda Kay for leadership with the earlier drafts and the later drafts, respectively. Lynda Doll's suggestions at several stages strengthened both scientific soundness and clarity.