CRP and rheumatoid arthritis: Erythrocyte sedimentation rate (ESR), c-reactive protein (CRP), rheumatoid factor (RF), anti-citrullinated peptide antibodies (ACPA), Health Assessment Questionnaire-Disability Index (HAQ-DI), Rheumatoid Arthritis Disease Activity Score (DAS28-CRP, DAS28-ESR), number of hospitalizations per year, joint manifestations