1. Department of Physiology, Faculty of Medicine, University of Peradeniya, Peradeniya, Sri Lanka
2. School of Psychological Sciences, The University of Newcastle, Callaghan, Australia
3. Department of Psychiatry, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, TX, USA
4. Department of Laboratory Science and Primary Care, Texas Tech University Health Sciences Center, Lubbock, TX, USA