1. University of Texas Health Science Center at San Antonio, San Antonio, Texas (V.M.)
2. David Geffen School of Medicine at UCLA and VA Greater Los Angeles Healthcare System, Los Angeles, California (J.L.M.)
3. Durham VA Healthcare System and Duke University School of Medicine, Durham, North Carolina (C.S.U.)
4. John D. Dingell VA Sleep Wake Disorders Center and Wayne State University, Detroit, Michigan (S.C.)
5. U.S. Army SAMHS Sleep Medicine Service, San Antonio, Texas, and Wilford Hall Ambulatory Surgical Center, Lackland Air Force Base, Texas (M.S.B.)
6. Walter Reed National Military Medical Center/Defense Health Agency, Bethesda, Maryland (C.S.)
7. Department of Veterans Affairs, Washington, DC (J.S.)