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2392 Studies found for: NITROGEN

A similar map is available for all studies in ClinicalTrials.gov

Click on the map below to show a more detailed map (when available) or search for studies (when map not available).

Map Legend
Region Name Number of Studies
World 2,392
Africa [map] 109
Central America [map] 40
East Asia [map] 485
Japan 108 [studies]
Europe [map] 722
Middle East [map] 119
North America 1,208
Canada [map] 258 [studies]
Mexico 88 [studies]
United States [map] 1,119 [studies]
North Asia [map] 131
Pacifica [map] 141
South America [map] 128
South Asia [map] 71
Southeast Asia [map] 98

Click on a [map] link to show a map of that region.

Click on a [studies] link to search within your current results for studies in that region. Use the back button to return to this list and try another region.

Studies with no locations are not included in the counts or on the map.

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