Author/Authors :
LI, Xiaolong School of Economics and Management - Beijing University of Posts and Telecommunications, Beijing, China , GAO, Yazhou School of Economics and Management - Beijing University of Aeronautics and Astronautic, Beijing, China , MIAO, Yanqing National Health Development Research Center - Ministry of Health, Beijing, China , CHEN, Wenjing School of Economics and Management - Beijing University of Posts and Telecommunications, Beijing, China
