Copyright (C) 1999-2001 Jose C. Pinheiro and Douglas M. Bates
Copyright (C) 2006-2015 The R Core team

This program 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.

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.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this file.  A copy of the GNU General Public License is
available at http://www.r-project.org/Licenses/

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This package contains the nlme (nonlinear mixed effects) package
version 3.1 for R.

Authors: Jose Pinheiro
         Douglas Bates <bates@stat.wisc.edu>
         Saikat DebRoy

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Copyright (C) 2015 Quantitative Solutions, a Certara company

Authors of 'fixed sigma option' of Nov. 2015:

         Siem Heisterkamp <sh.heisterkamp@icloud.com>
         Bert van Willigen <info@vanwilligen-ict.com>
         Paul Matthias Diderichsen <pmdiderichsen@wequantify.com>  (sponsor)