Funding for this research was provided by:
Text and Data Mining valid from 2020-02-08
Accepted: 26 January 2020
First Online: 8 February 2020
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee (research project entitled “Image guided radiotherapy in gastrointestinal malignancies” notified to the Ethical Committee of the IEO, Milan, Italy No. IEO N87/11) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.