1 King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and Hospital of Southern Jutland, Jutland, and Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark; achristiansen@gigtforeningen.dk.
2 Rufibach rePROstat, Biostatistical Consulting and Training, Basel, Switzerland.
3 King Christian 10th Hospital for Rheumatic Diseases, Gråsten, and Hospital of Southern Jutland, Jutland, and Institute of Regional Health Research, University of Southern Denmark, Odense, Denmark. Dr. Rufibach is founder and owner of Rufibach rePROstat and is an employee of F. Hoffmann-La Roche, Department of Biostatistics, Basel, Switzerland.