1. Cardiology Unit, Department of Internal Medicine, Faculty of Medicine, Universiti Teknologi MARA (UiTM), Sungai Buloh, Selangor, Malaysia
2. BP Clinical Lab Sdn Bhd, BP Healthcare Group, Selangor, Malaysia
3. Department of Internal Medicine, Hospital Selayang, Selangor, Malaysia
4. Pharmacy Department, Hospital Shah Alam, Selangor, Malaysia