About the Authors

Kwon-Yul Ryu

Contributed equally to this work with: Kwon-Yul Ryu, Hyejin Park

kyryu@uos.ac.kr

Affiliation Department of Life Science, University of Seoul, Seoul, Republic of Korea

Hyejin Park

Contributed equally to this work with: Kwon-Yul Ryu, Hyejin Park

Affiliation Department of Life Science, University of Seoul, Seoul, Republic of Korea

Derrick J. Rossi

Affiliation Immune Disease Institute, Harvard Stem Cell Institute, and the Department of Pathology, Harvard Medical School, Boston, Massachusetts, United States of America

Irving L. Weissman

Affiliation Department of Pathology, Stanford University School of Medicine, Stanford, California, United States of America

Ron R. Kopito

Affiliation Department of Biology, Stanford University, Stanford, California, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KR HP DJR ILW RRK. Performed the experiments: KR HP DJR. Analyzed the data: KR HP DJR. Wrote the paper: KR HP DJR.