About the Authors

Bart J Emmer, Jeroen van der Grond, Mark A van Buchem
Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands

Gerda M Steup-Beekman, Tom W. J Huizinga
Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands

Corresponding Author

b.j.emmer@lumc.nl

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

BJE, JvdG, and TWJH designed the study. BJE, JvdG, TWJH, and MAvB analyzed the data. TWJH enrolled patients. BJE, JvdG, GMSB, TWJH, and MAvB contributed to writing the paper. TWJH wrote the grant that covers the salary of the BJE together with MavB.