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3211 Studies found for: Pulmonary Disease, Chronic Obstructive
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Map Legend
Region Name   Number of Studies
World 3,211  
Africa   [map]   109  
Central America   [map]   33  
East Asia   [map]   349  
Japan 71   [studies]
Europe   [map]   1,500  
Middle East   [map]   133  
North America 1,037  
Canada   [map]   294   [studies]
Mexico 53   [studies]
United States   [map]   851   [studies]
North Asia   [map]   148  
Pacifica   [map]   119  
South America   [map]   200  
South Asia   [map]   52  
Southeast Asia   [map]   71  

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Studies with multiple locations are included in each region containing locations.