Acknowledgments
Tuomas Selander M.Sc is acknowledged for statistical guidance, Antti Ropponen for analyses by flow cytometry and David Laaksonen M.D., Ph.D. for linguistic revision.
Disclosure statement
Dr. Partanen reports honoraria from Behring and Abbvie and has participated in Scientific Advisory Board meetings organized by Abbvie and Takeda. Dr. Valtola reports honoraria from Amgen, Janssen-Cilag, and Sanofi. Dr. Varmavuo reports consultancy fees from Abbvie, Amgen, Celgene, Janssen-Cilag, Roche, and Sanofi. Dr. Jantunen reports honoraria from Amgen and Sanofi and has participated in Scientific Advisory Board meetings organized by Amgen, Takeda, and TEVA. The other authors declare no conflicts of interest.