1. Institute of Medicinal Plants, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, China
2. Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
3. College of Earth and Environmental Sciences, University of the Punjab, Lahore, Pakistan
4. Directorate of Distance Education, Department of Mathematics, Sub Campus Bahauddin Zakariya University, Sahiwal, Punjab, Pakistan
5. Department of Physics, University of the Punjab, Lahore, Pakistan
6. Nantional Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, China