1 Mental Health Healthcare Group, Long Beach VA Healthcare System, Long Beach, CA, USA; Department of Psychiatry and Human Behavior, University of California, Irvine, CA, USA. Electronic address: creist@uci.edu.
2 Mental Health Healthcare Group, Long Beach VA Healthcare System, Long Beach, CA, USA.
3 Mental Health Healthcare Group, Long Beach VA Healthcare System, Long Beach, CA, USA; Department of Psychiatry and Human Behavior, University of California, Irvine, CA, USA.
4 Sleep & Human Health Institute, Albuquerque, NM, USA; Maimonides Sleep Arts & Sciences, Ltd, USA.