About the Authors

Xiaoyan Gao

Affiliation State Key Laboratory for Infectious Disease Control and Prevention, Institute for Viral Disease Control and Prevention, Chinese Center for Diseases Control and Prevention, Beijing, China

Roger Nasci

Affiliation Centers for Disease Control and Prevention, Fort Collins, Colorado, United States of America

Guodong Liang

gdliang@hotmail.com

Affiliation State Key Laboratory for Infectious Disease Control and Prevention, Institute for Viral Disease Control and Prevention, Chinese Center for Diseases Control and Prevention, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.