Talifu, Ainiwaer
Saimaiti, Refuhati
Maitinuer, Yusufu
Liu, Geyu
Abudureyimu, Miernisha
Xin, Xuelei
Article History
Received: 7 August 2018
Accepted: 31 January 2019
First Online: 13 March 2019
Competing Interests
: The authors declare no competing interests.