    AND a.RELATIONSHIP_ID = 'Contains'
   JOIN concept b2
     ON concept_id_2 = b2.concept_id
-   AND REGEXP_LIKE (b2.concept_class_id,'Drug|Marketed')
+   AND REGEXP_LIKE (b2.concept_class_id,'Drug|Marketed') --only Drugs
    AND b2.vocabulary_id = 'RxNorm'
    AND b2.invalid_reason IS NULL
 UNION

                            WHERE denominator_value < 0.05
                            AND   denominator_unit = 'mL');

-- Fixes U/mg to U/mL
UPDATE DS_STAGE
   SET NUMERATOR_VALUE = 10000,
       DENOMINATOR_UNIT = 'mL'

         AND a2.vocabulary_id = 'RxNorm Extension')
UNION
-- Units
-- !!!Anna, why not just to include all the units as it was in a first version of script?
SELECT DISTINCT CONCEPT_NAME,
       'Rxfix',
       'Unit',
