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2917 Studies found for: Headache
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Map Legend
Region Name   Number of Studies
World 2,917  
Africa   [map]   96  
Central America   [map]   48  
East Asia   [map]   289  
Japan 61   [studies]
Europe   [map]   763  
Middle East   [map]   122  
North America 1,402  
Canada   [map]   235   [studies]
Mexico 49   [studies]
United States   [map]   1,260   [studies]
North Asia   [map]   66  
Pacifica   [map]   72  
South America   [map]   109  
South Asia   [map]   61  
Southeast Asia   [map]   98  

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