Shahri, Keyhandokht Karimi1
1University of Birjand, Physics Department, School of Sciences, Birjand, Iran.
The author declares no conflicts of interest.
For correspondence contact: Keyhandokht, Karimi Shahri Physics Department, School of Sciences, University of Birjand, 9717851367, Birjand, Iran, or email at [email protected].
(Manuscript accepted 30 September 2019)
doi: 10.1097/HP.0000000000001217