RT Journal Article SR Electronic T1 Cerebral Venous Thrombosis as a Cause of Acute Headache JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 295 OP 298 DO 10.3122/jabfm.17.4.295 VO 17 IS 4 A1 Grover, Michael YR 2004 UL http://www.jabfm.org/content/17/4/295.abstract AB