Serum Level of CXCL12 in Rheumatoid Arthritis Patients and its Correlation with Disease Activity.Published in:Zagazig University Medical Journal, 2024, v. 30, n. 3, p. 739, doi. 10.21608/ZUMJ.2023.238595.2916By:Ahmed Nasr, Amira Asaad;Elady, Basma;Borg, Asmaa M.;Elmarghany, Eman BakrPublication type:Article