The calculators which are provided are freeware for personal use only. They are not public domain software and may not be sold or used for commercial purposes.

Permission to use and backup this software for any non-commercial purpose, without fee, and without a written agreement is hereby granted.

Permission to distribute this software for any non-commercial purpose, without fee, and without a written agreement is hereby granted, provided that a reference to the following website and the entire License and Disclaimer are provided with all distributed copies:

The author has made every effort to ensure that the information provided by this software is accurate and conforms to the methods described in the publication.

However, the survival estimates published in the paper and which are estimated with these calculators may be higher than those found in current clinical practice. In addition, a patient's prognosis may depend on other factors than those taken into account here. Thus any decisions concerning patient care should not be based only on the use of these calculators, but should also take into account the patient's past history and other current patient and tumor characteristics. As medical science is constantly changing and human error is always possible, the author and the EORTC do not warrant the calculators' accuracy nor are they responsible for any omissions, errors or outcomes resulting from the use of these calculators.

In no event shall either the author or the EORTC be liable to any party for any direct, indirect, special, incidental, or consequential damages, including lost profits, arising from the use of this software even if they have been advised of the possibility of such damage.

The author and the EORTC specifically disclaim any warranties, including but not limited to, the implied warranty of fitness for calculating the probabilities survival for patients with recurrent GBM. The software provided hereunder is on an “as is” basis and neither the author nor the EORTC have any obligations to provide maintenance, support, updates, enhancements or modifications.