Database: regional_sales
Question: In which regions are the stores that have shipped products through the WARE-UHY1004 warehouse?
SQL: SELECT T FROM ( SELECT DISTINCT CASE  WHEN T3.WarehouseCode = 'WARE-UHY1004' THEN T1.Region END AS T FROM Regions T1 INNER JOIN `Store Locations` T2 ON T2.StateCode = T1.StateCode INNER JOIN `Sales Orders` T3 ON T3._StoreID = T2.StoreID ) WHERE T IS NOT NULL