1999-2018 James J. Messina, Ph.D. & Constance Messina, Ph.D.  For more information contact Jim at  jamesjmessina@gmail.com    Note: Original materials on this site may be reproduced for your personal, educational or noncommercial use as long as you credit the authors and website. You are encouraged to reproduce all internet resources on this site on your sites which have similar interests and audiences.