RT Journal Article SR Electronic T1 Incidence Of Tuberculin Test Conversion Among Employees Of A Metropolitan Hospital JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 237 OP 238 DO 10.3122/jabfm.8.3.237 VO 8 IS 3 A1 Armstrong, Marc A. A1 Johnson, Rosie L. YR 1995 UL http://www.jabfm.org/content/8/3/237.abstract AB