1. Department of Medicine, Al-Azhar Medical College, Kerala, India
2. Department of Medicine, Kings College Hospital NHS Foundation Trust, London,BR68ND, United Kingdom
3. Department of Endocrinology & Metabolism, Eastbourne Hospital, Eastbourne, BN212UD, United Kingdom
4. Department of Endocrinology & Metabolism, Lancashire Teaching Hospitals NHS Foundation Trust, Preston, PR2 9HT, United Kingdom