[1] George E Wahlen Dept Vet Affairs Med Ctr, Salt Lake City, UT USA
[2] Baylor Univ, Dept Psychol & Neurosci, One Bear Pl 97334, Waco, TX 76798 USA
[3] WG Bill Hefner Vet Affairs Med Ctr, VA Mid Atlantic Mental Illness Res Educ & Clin Ct, Salisbury, NC 28144 USA
[4] Baylor Univ, Dept Psychol & Neurosci, North Texas VA Hlth Care Syst, Waco, TX 76798 USA
[5] Baylor Univ, Dept Psychol & Neurosci, Waco, TX 76798 USA