[1] AbbVie Inc, Clin Pharmacol, N Chicago, IL USA
[2] AbbVie Inc, Immunol Dev, N Chicago, IL USA
[3] AbbVie Inc, Discovery & Exploratory Stat, N Chicago, IL USA
[4] Asklepios Clin Sankt Augustin, Dept Gen Paediat, St Augustin, Germany
[5] Univ Hosp Cologne, Dept Pediat & Adolescents Med, Cologne, Germany
[6] Cincinnati Childrens Hosp Med Ctr, Pediat Rheumatol Collaborat Study Grp PRCSG, Cincinnati, OH USA