Lakshmi Nandini Moorthy1
, Margaret GE Peterson2
, Melanie J Harrison3
, Karen B Onel4
and Thomas JA Lehman5 
1
Robert Wood Johnson Medical School-UMDNJ, Dept. of Pediatrics, Division of Rheumatology, New Brunswick, NJ 08903, USA
2
Hospital For Special Surgery, 535 East 70th Street, New York, NY 10021, USA
3
Wyeth Research, 500 Arcola Road, Collegeville, PA 19426, USA
4
Pediatric Rheumatology, The Univeristy of Chicago Medical Center, MC5044, 5841 South Maryland Avenue, Chicago, IL 60637, USA
5
Pediatric Rheumatology, Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA