VCAM1 and rheumatoid arthritis: Twenty studies (21 comparator groups) investigated VCAM-1 in a total of 1446 RA patients (mean age 50 years, 81% females) and 1044 healthy controls (mean age 48 years, 79% females) [72, 83, 86, 88, 93, 97, 98, 100, 103–107, 109–112, 116–118].