About the Authors

Han Gil Seo

Affiliation Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea

Nam-Jong Paik

Affiliation Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea

Shi-Uk Lee

Affiliation Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Boramae Medical Center, Seoul, Republic of Korea

Byung-Mo Oh

Affiliation Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea

Min Ho Chun

Affiliation Department of Rehabilitation Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea

Bum Sun Kwon

Affiliation Department of Rehabilitation Medicine, Dongguk University Ilsan Hospital, Goyang, Republic of Korea

Moon Suk Bang

msbang@snu.ac.kr

Affiliation Department of Rehabilitation Medicine, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Republic of Korea

Competing Interests

The study was sponsored by Medytox Inc. BMO received honoraria for lectures from Medytox Inc. There are no other declarations relating to employment, consultancy, patents, products in development, marketed products, etc. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: NJP SUL MHC BSK MSB. Performed the experiments: NJP SUL BMO MHC BSK MSB. Analyzed the data: HGS BMO MSB. Contributed reagents/materials/analysis tools: NJP SUL MHC BSK MSB. Wrote the paper: HGS BMO MSB.