Presidio of San Francisco,Ca 94129 SUMMARY

United States Government purposes. Destroy this report when it is no longer needed. Do not return it to the originator. Citation of trade names in this report does not constitute an official endorsement or approval of the use of such items. Human Subjects participated in thes studies after giving their free and informed voluntary consent. Investigators adhered to AR 70-25 and USAMRDC Reg 50-25 on the use of volunteer in research. This material has been reviewed by Letterman Army Institute of Research and there is no objection to its presentation and/ or publication. The opinions or assertions contained herein are the private views of the author(s) and are not to be con-strued as official or as reflecting the views of the Department of the Army or the Department of efense. (AR 360-5).. o............o....o....o....o........................ (Migature md dte) This document has been approved for public release and sale; its distribution is unlimited