[1] Amsterdam UMC, Amsterdam Ctr Quantitat Mass Spectrometry, Dept Lab Med, Amsterdam, Netherlands
[2] Amsterdam UMC, Amsterdam Rheumatol & Immunol Ctr, Amsterdam, Netherlands
[3] Reade, Amsterdam, Netherlands
[4] Amsterdam UMC, Dept Lab Med, Amsterdam, Netherlands
[5] Univ Med Ctr Utrecht, Dept Rheumatol & Clin Immunol, Utrecht, Netherlands