|
pubmed:affiliation |
Department of Health Policy and Management, Center for Injury Research and Policy, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland 21218, USA. kpollack@jhsph.edu
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|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, Non-U.S. Gov't,
Evaluation Studies,
Research Support, N.I.H., Extramural
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