872 studies found for:    "Observational" [STUDY-TYPES] AND HIV [CONDITION]
872 studies found, shown on map.
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 872  
Africa   [map]   106  
Central America   [map]   51  
East Asia   [map]   39  
Japan 6   [studies]
Europe   [map]   124  
Middle East   [map]   8  
North America 458  
Canada   [map]   25   [studies]
Mexico 2   [studies]
United States   [map]   442   [studies]
North Asia   [map]   5  
Pacifica   [map]   20  
South America   [map]   32  
South Asia   [map]   8  
Southeast Asia   [map]   50  
Hints:

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.