1. Department of Psychiatry, University of Texas Health Science Center at San Antonio, TX
2. Department of Neurology, Methodist Neurological Institute, Houston, TX
3. Carle Neuroscience Institute, University of Illinois College of Medicine at Urbana-Champaign, Urbana, IL
4. Viterbi Family Sleep Center, Scripps Clinic, La Jolla, CA
5. RLS Center, Johns Hopkins University School of Medicine, Baltimore, MD
6. Department of Biostatistics, Vanderbilt School of Medicine, Nashville, TN
7. Department of Neurology, Vanderbilt University Medical Center, Nashville, TN