BÜHLMANN sCAL ELISA:
Hurnakova J et al.: Serum Calprotectin Discriminates Subclinical Disease Activity from Ultrasound- Defined Remission in Patients with Rheumatoid Arthritis in Clinical Remission; PLoS One; 2016: e0165498. PMID: 27832086 DOI: 10.1371/journal.pone.0165498