@misc{indiciaee8ffb7030c49, title = {Surveillance. Information for action.}, author = {W A Orenstein and R H Bernier}, year = {1990}, doi = {10.1016/s0031-3955(16)36912-7}, url = {https://pubmed.ncbi.nlm.nih.gov/2190144/}, note = {Source identifier: 2190144} }