[1] Hanyang Univ, Hosp Rheumat Dis, Seoul 133792, South Korea
[2] Hanyang Univ, Coll Med, Seoul 133791, South Korea
[3] Mem Univ Newfoundland, Dept Publ Hlth Sci, St John, NF, Canada
[4] Hosp Sick Children, Res Inst, Program Genet & Genome Biol, Toronto, ON M5G 1X8, Canada
[5] Univ Toronto, Toronto, ON, Canada
[6] Toronto Western Hosp, Toronto, ON M5T 2S8, Canada