1. Reading School of Pharmacy, University of Reading, Whiteknights, P.O. Box 224, Reading RG6 6DX, United Kingdom
2. Department of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 050040 Almaty, Kazakhstan
3. Centre for Drug Delivery Research, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia