About the Authors

Jian Zhou, Fang Yang, N. Adrian Leu, P. Jeremy Wang
Department of Animal Biology, Center for Animal Transgenesis and Germ Cell Research, University of Pennsylvania School of Veterinary Medicine, Philadelphia, Pennsylvania, United States of America

Corresponding Author

pwang@vet.upenn.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JZ PJW. Performed the experiments: JZ FY NAL PJW. Analyzed the data: JZ PJW. Wrote the paper: PJW.