citation information (apr 2008, from ISI web of knowledge)
2. Karlson EW, Chibnik LB, Cui J, et al. Associations between Human leukocyte antigen, PTPN22, CTLA4 genotypes and rheumatoid arthritis phenotypes of autoantibody status, age at diagnosis and erosions in a large cohort study ANNALS OF THE RHEUMATIC DISEASES Volume: 67 Issue: 3 Pages: 358-363 Published: MAR 2008 1. Jepsen KJ, Hu B, Tommasini SM, et al. Genetic randomization reveals functional relationships among morphologic and tissue-quality traits that contribute to bone strength and fragility MAMMALIAN GENOME 18 (6-7): 492-507 JUL 2007