All routines in this directory are copyright (c) 1998 by 
Harvard University, all rights reserved.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

This code was written by David Shera while a graduate student
at the Harvard School of Public Health funded by a 
National Institute of Health Training Grant in Psychiatric
Epidemiology and Biostatistics.

