Text and Data Mining valid from 2019-06-27
Received: 17 October 2018
Accepted: 3 June 2019
First Online: 27 June 2019
Change Date: 23 September 2019
Change Type: Correction
Change Details: In the original publication of this article , the first affiliation name in the Author details section should be updated to ‘Department of Radiation Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital & Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen 518116, China’ because the affiliation has been renamed from Jun. 15th, 2019.
Ethics approval and consent to participate
: The protocol of this study was approved by the institutional ethics committee of the Sun Yat-sen University Cancer Center, and consent for the use of data in research was obtained for each participant.
: Not applicable.
: The authors declare that they have no competing interests.