C V Tong1, Z Hussein2, N Mohd Noor2, M Mohamad2, W F Ng2. 1. From the Department of Medicine, Endocrine Unit, Hospital Putrajaya, Pusat Pentadbiran Kerajaan Persekutuan, Presint 7, 62250 Putrajaya, Malaysia tchinvoon@yahoo.com. 2. From the Department of Medicine, Endocrine Unit, Hospital Putrajaya, Pusat Pentadbiran Kerajaan Persekutuan, Presint 7, 62250 Putrajaya, Malaysia.