BSD 3-Clause License (see https://opensource.org/licenses/BSD-3-Clause)  

Copyright (c) 2016-2019, Paul Macklin and the PhysiCell Project                  
All rights reserved.                                                     

Redistribution and use in source and binary forms, with or without       
modification, are permitted provided that the following conditions are   
met:                                                                     

1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.                    

2. Redistributions in binary form must reproduce the above copyright     
notice, this list of conditions and the following disclaimer in the      
documentation and/or other materials provided with the distribution.     
        
3. Neither the name of the copyright holder nor the names of its         
contributors may be used to endorse or promote products derived from this
software without specific prior written permission.                      

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS      
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A          
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,      
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR       
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF   
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING     
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS       
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.