title: Dr. Elsaman, et al reply.
authors.affiliation: Consultant and lecturer in rheumatology and rehabilitation, Sohag University.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Elsaman
authors.affiliation: Consultant and lecturer in rheumatology and rehabilitation, Sohag University.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Radwan
authors.affiliation: Consultant and lecturer in pharmacology, Sohag University, Sohag, Egypt.
authors.forename: Walaa
authors.initials: W
authors.lastname: Mohammed
authors.affiliation: Specialist in Internal Medicine/Rheumatology, Department of Rheumatology and Clinical Immunology, Charité Universitätsmedizin Berlin, Berlin, Germany. sarah.ohrndorf@charite.de.
authors.forename: Sarah
authors.initials: S
authors.lastname: Ohrndorf