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Table 2 Example of search strategy and identified hits incremental search

From: The international WAO/EAACI guideline for the management of hereditary angioedema – the 2017 revision and update

Step Search terms Hits
1 “Hereditary angioedema” OR “Hereditary angiooedema” OR
“Hereditary angio-oedema” OR “Hereditary angioneurotic oedema”
OR “Hereditary angioneurotic edema”
2063
2 Limit to yr. = 2010/09/01 - current (2016/05/31) 718
3 Limit to “Clinical Trial” 51