Epistasis amongst PTPN2 and genes of the vitamin D pathway contributes to risk of juvenile idiopathic arthritis

Justine A. Ellis, Katrina J. Scurrah, Yun R. Li, Anne Louise Ponsonby, Raul A. Chavez, Angela Pezic, Terence Dwyer, Jonathan D. Akikusa, Roger C. Allen, Mara L. Becker, Susan D. Thompson, Benedicte A. Lie, Berit Flatø, Øystein Førre, Marilynn Punaro, Carol Wise, Terri H. Finkel, Hakon Hakonarson, Jane E. Munro