authors Schalock, Robert L Luckasson, Ruth A Shogren, Karrie A Borthwick-Duffy, Sharon Bradley, Val Buntinx, Wil H E Coulter, David L Craig, Ellis M Gomez, Sharon C Lachapelle, Yves Alya Reeve, MD, MPH, FANPA Snell, Martha E Spreat, Scott Tassé, Marc J Thompson, James Verdugo, Miguel A Wehmeyer, Michael L Yeager, Mark H