About the Authors

Young U. Ryu

ryuyounguk@gmail.com

Affiliation Department of Physical Therapy, Catholic University of Daegu, Gyeongsan, South Korea

John J. Buchanan

Affiliation Department of Health & Kinesiology, Texas A & M University, College Station, Texas, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YUR JJB. Performed the experiments: YUR. Analyzed the data: YUR. Contributed reagents/materials/analysis tools: YUR. Wrote the paper: YUR JJB.