[Xiang, Ping-an; Yu, Liang] Hunan Agr Univ, Hunan Key Lab Rural Ecosyst Hlth Dongting Lake Ar, Changsha 410128, Hunan, Peoples R China.
[Yu, Liang] Hunan First Normal Univ, Dept Res & Dev Off, Changsha 410205, Hunan, Peoples R China.
[Qin, Hong] Cent South Univ, Xiangya Sch Publ Hlth, 110 Xiangya Rd, Changsha 410078, Hunan, Peoples R China.
[Xiang, Ping-an] Hunan Agr Univ, Sch Business, Changsha 410128, Hunan, Peoples R China.