Ratnasingam J, Tan A T B, Vethakkan S R, Paramasivam S S, Ibrahim L, Lim L L, Choong K
Endocrine Unit, Department of Medicine, University Malaya Medical Centre, 59100 Kuala Lumpur, Malaysia.
J Clin Endocrinol Metab. 2013 Mar;98(3):869-70. doi: 10.1210/jc.2012-3839. Epub 2013 Jan 21.