Adrian Ciurea et al., "Does the reason for discontinuation of a firt TNF inhibitor influence the effectiveness of a second TNF inhibitor in axial spondyloarthritis? Results from the Swiss Clinical Quality Management Cohort", Arthritis Research & Therapy 2016, 18:71.
Axel Finckh et al., "The impact of patient heterogeneity and socio-economic factors across nine European countries on abatacept retention in rheumatoid arthritis". RMD Open. 2015 Apr 30;1(1): PMID: 26509062.