These entries can help individuals customize geographic information in
Update Study Risk Data Set
in order to geocode clinical trial sites. This information can be used to help with the spelling of city and state-province combinations. In general, it is recommended that ZIP codes are used for U.S. sites; non-U.S. sites require specification of country, city, and state or province. If geocoding is unsuccessful or for more specific geocoding (down to the front door of the clinic, for example), latitudes and longitudes can be entered manually using this table or other GPS services.