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Table 1 Search strategy (Web of Science Core Correlation), conducted in January 2017

From: Global avian influenza outbreaks 2010–2016: a systematic review of their distribution, avian species and virus subtype

1. “avian influenza AND case”.mp
2. “avian influenza virus AND case”.mp
3. “avian flu AND case”.mp
4. 1 or 2 or 3
5. “avian influenza AND outbreak”.mp
6. “avian influenza virus AND outbreak”.mp
7. “avian flu AND outbreak”.mp
8. 5 or 6 or 7
9. limit 1 or 2 or 3 or 5 or 6 or 7 to publication years =“2010-2016”
10. limit to document types=“articles” and “reviews”