1. Department of Physics, Riphah International University, Campus Lahore, Pakistan
2. Department of Electrical and Biological Physics, Kwangwoon University, Seoul 01897, Korea
3. Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
4. Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou, P. R. China