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School closures and influenza: systematic review of epidemiological studies
Jackson, C., Vynnycky, E., Hawker, J., Olowokure, B., Mangtani, P.Volume:
3
Language:
english
Journal:
BMJ Open
DOI:
10.1136/bmjopen-2012-002149
Date:
February, 2013
File:
PDF, 990 KB
english, 2013