Software in the Hmisc and Design libraries is Copyright (C) 1991-2004 by Frank E Harrell Jr
This is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version.
These functions are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
The text of the GNU General Public License, version 2, is available as
http://www.gnu.org/copyleft or by writing to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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FrankHarrell - 11 Feb 2004