The copyrights of this software are owned by Duke University. As such, two licenses for this software are offered: 1. An open-source license under the GPLv2 license for non-commercial use. 2. A custom license with Duke University, for commercial use without the GPLv2 license restrictions. As a recipient of this software, you may choose which license to receive the code under. Outside contributions to the Duke-owned code base cannot be accepted unless the contributor transfers the copyright to those changes over to Duke University. To enter a custom license agreement without the GPLv2 license restrictions, please contact the Digital Innovations department at the Duke Office for Translation & Commercialization (OTC) (https://olv.duke.edu/software/) at otcquestions@duke.edu with reference to “OTC File No. T-007874 in your email. Please note that this software is distributed AS IS, WITHOUT ANY WARRANTY; and without the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.