TY  - RPRT
TI  - Update in preventive medicine.
AU  - L H Beck
AU  - S P Kumar
PY  - 1999
DO  - 10.7326/0003-4819-131-9-199911020-00009
UR  - https://pubmed.ncbi.nlm.nih.gov/10577331/
ID  - 10577331
ER  -