1. Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Perak, Malaysia
2. Department of Pure and Industrial Chemistry, Faculty of Natural and Applied Science, Umaru Musa Yar’adua University, Katsina, Nigeria
3. School of Chemical Sciences, University of Auckland, Auckland, New Zealand
4. The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
5. Department of Fundamental Dental and Medical Sciences, Kulliyyah of Dentistry, International Islamic University Malaysia, Pahang, Malaysia
6. Melbourne Dental School, The University of Melbourne, Victoria, Australia
7. Atta-ur-Rahman Institute for Natural Product Discovery (AuRIns), Universiti Teknologi MARA, Bandar Puncak Alam, Selangor, Malaysia
8. Faculty of Applied Sciences, Universiti Teknologi MARA, Shah Alam, Selangor, Malaysia