Funding for this research was provided by:
Science Development Foundation under the President of the Republic of Azerbaijan (Grant # EIF-2014-9(24)-KETPL-14/13/3)
Received: 17 February 2021
Accepted: 20 April 2021
First Online: 24 May 2021
: Our study is a retrospective. For this type of study, formal consent is not required.
: This article does not contain any studies with individual participants performed by any of the authors.
: The authors declare that they have no conflict of interest.