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1 Department of Gastroenterology, Infectiology and Rheumatology, Campus Benjamin Franklin Charité - Universitätsmedizin, Berlin, Germany; Department of Epidemiology, German Rheumatism Research Centre, Berlin, Germany. Electronic address: denis.poddubnyy@charite.de.
2 Division of Rheumatology, Toronto Western Hospital, University of Toronto, Toronto, Canada; Krembil Research Institute, University Health Network, University of Toronto, Canada. Electronic address: nigil.haroon@uhn.ca.
1 Department of Gastroenterology, Infectiology and Rheumatology, Campus Benjamin Franklin Charité - Universitätsmedizin, Berlin, Germany; Department of Epidemiology, German Rheumatism Research Centre, Berlin, Germany. Electronic address: denis.poddubnyy@charite.de.
2 Division of Rheumatology, Toronto Western Hospital, University of Toronto, Toronto, Canada; Krembil Research Institute, University Health Network, University of Toronto, Canada. Electronic address: nigil.haroon@uhn.ca.