The Navy Times and Marine Corps Times printed a letter titled “Meditation studied in ’85” by Col. Brian Rees, M.D. and David Leffler, Ph.D. describing a study published in the Journal of Counseling and Development. This peer-reviewed research by the University of Colorado School of Medicine found that the Transcendental Meditation technique (the practical component of Invincible Defense Technology) is effective because it directly affects neurobiological aspects specifically touched by PTSD.