1. Institute of Eco-environmental Sciences, Liaoning Shihua University, No.1, West Dandong Road, Wanghua District, Fushun, Liaoning Province 113001, China
2. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
3. Department of Medical Administration, the General Hospital of Shenyang Military Area, 83 Wenhua Road, Shenhe District, Shenyang City, Liaoning Province 110001, China