Sohail, M.
Khan, M. Saleem
Omer, Muhammad
Marwat, Ihsan Ullah
Saeed Khattak, Noor
Khan, Sana Ullah
Ullah, Zakir
Rahman, Sami Ur
Article History
Received: 27 July 2017
Revised: 12 April 2018
Accepted: 17 May 2018
First Online: 12 June 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.