About the Authors

Wonjoong Cheon

Roles Formal analysis, Writing – original draft

Affiliations Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea, Proton Therapy Center, National Cancer Center, Goyang, Korea

Hyunuk Jung

Roles Conceptualization

Affiliations Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea, Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia, United States of America

Moonhee Lee

Roles Data curation

Affiliation Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea

Jinhyeop Lee

Roles Data curation

Affiliation Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea

Sung Jin Kim

Roles Data curation

Affiliation Department of Radiation Oncology, Samsung Medical Center, Seoul, Korea

Sungkoo Cho

Roles Validation

Affiliation Department of Radiation Oncology, Samsung Medical Center, Seoul, Korea

Youngyih Han

Roles Supervision, Writing – review & editing

youngyih@skku.edu

Affiliations Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Korea, Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Competing Interests

The Samsung Medical Center provided support in the form of salaries for authors S.J Kim, and S.K. Cho and Y. Han but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the ‘author contributions’ section. Also the Samsung Medical Center affiliation does not alter our adherence to PLOS ONE policies on sharing data and materials.