1. Department of Laboratory Medicine , National University Hospital , 5 Lower Kent Ridge Road , Singapore 119074 , Singapore , Phone: (+65) 67724345, Fax: (+65) 67771613
2. Department of Clinical Chemistry and Endocrinology, New South Wales Health Pathology , Prince of Wales Hospital , Sydney , Australia
3. Department of Laboratory Medicine , Chinese PLA General Hospital , Beijing , P.R. China
4. Department of Pathology and Laboratory Medicine , Emory University , Atlanta, GA , USA
5. Clinical Biochemistry, The Hospital for Sick Children , University of Toronto , Toronto, ON , Canada
6. Laboratory of Microbiology and Virology , University Vita-Salute San Raffaele , Milan , Italy
7. IRCCS San Raffaele Hospital , Milan , Italy
8. Università Vita-Salute San Raffaele , Milan , Italy
9. Department of Laboratory Medicine , Tan Tock Seng Hospital , Singapore , Singapore
10. Department of Laboratory Medicine , National University Hospital , Singapore , Singapore
11. Section of Clinical Biochemistry, Department of Neuroscience, Biomedicine and Movement , University of Verona , Verona , Italy