Rheumatoid arthritis and cardiovascular disease in relation to cytomegalovirus infection: a pilot cross-sectional study - Mohammed Ahmed Al-Kaif; Laith A. I. K. Al-Kaif; Zaid Saad Madhi; Dalya Talal Fathi Al-Azzawi; Wael Rasheed Obaead Alfatlawi; Sarah Kassab Shandaway Al-Zamali; Fatin Alaa Abdul Ameer Mahdi; Haibo Liu (Frontiers in Medicine, 2026)