Ninjbat, Uuganbaatar
Article History
Received: 29 March 2018
Accepted: 14 July 2018
First Online: 21 July 2018
Compliance with ethical standards
:
: I testify that this article has not been published in whole or in part elsewhere; it is not currently being considered for publication in another journal; and its content is my sole creation. The author have no conflict of interest. There are no funding nor informed consents from an external source.