1. Center for Diagnostic, Therapeutic and Investigative Studies, Faculty of Health Science, Universiti Kebangsaan Malaysia, 50300 Jalan Raja Muda Abdul Aziz, Federal Territory Kuala Lumpur, Malaysia
2. Department of Physics, Faculty of Applied Science, Universiti Teknologi MARA Cawangan Pahang, 26400 Jengka, Pahang Darul Makmur, Malaysia