RT Journal Article SR Electronic T1 Dimensions of Evidence JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 216 OP 223 DO 10.3122/15572625-11-3-216 VO 11 IS 3 A1 Alfred O. Berg YR 1998 UL http://www.jabfm.org/content/11/3/216.abstract AB