Vieira, Verónica M.; Hart, Jaime E.; Webster, Thomas F.; Weinberg, Janice; Puett, Robin; Laden, Francine; Costenbader, Karen H.; Karlson, Elizabeth W.
(National Institute of Environmental Health Sciences, 2010-07)
BACKGROUND. The etiology of rheumatoid arthritis (RA) remains largely unknown, although epidemiologic studies suggest genetic and environmental factors may play a role. Geographic variation in incident RA has been observed ...
