SERPINF1 and rheumatoid arthritis: Moreover, to investigate whether specific molecules related to adipose tissue excess are associated with the inflammatory burden of RA, PEDF, and Chemerin plasma values were assessed in RA patients at disease onset compared to healthy subjects stratified by BMI category [30 healthy individuals, among whom 70% female, with a mean age of 50.0 years (SD = 9.6) and 12 (40.0%) overweight or obese].