TY  - RPRT
TI  - Tuberculin sensitivity in elderly patients.
AU  - C E Woodruff
AU  - P T Chapman
PY  - 1971
DO  - 10.1164/arrd.1971.104.2.261
UR  - https://pubmed.ncbi.nlm.nih.gov/5558995/
ID  - 5558995
ER  -