Update CPRD_Referral_STEM.md

Changed type_concept_id from 32827 to 32817 (EHR)

docs/CPRD/CPRD_Referral_STEM.md

@@ -38,5 +38,5 @@ Any record with one of the SARS-COV-2 read codes listed below should be mapped t
 | concept_id | medcode | Use the medcode to link to the medical table to find the read code. Use the [SOURCE_TO_STANDARD](https://github.com/OHDSI/ETL-LambdaBuilder/blob/master/docs/Standard%20Queries/SOURCE_TO_STANDARD.sql) query to map the read code to standard concept(s) with the following filters: <br> <br>  Where source_vocabulary_id = 'Read'  and Target_standard_concept = 'S'  and target_invalid_reason is NULL<br><br>*BE CAREFUL - READ CODES ARE CASE SENSITIVE*. If there is no mapping available, set concept_id to zero. | See [CPRD_Referral_Medcodes.sql](https://github.com/OHDSI/ETL-LambdaBuilder/blob/master/docs/CPRD/Queries/CPRD_Referral_Medcodes.sql) for an idea of how the codes in the referral table map to the vocabulary and how the link between the referral table and medical table should be made.  |
 | source_value | medical.read_code | Use the medcode to link to the medical table to find the read code. Store read code as source_value. |  |  |
 | source_concept_id | medcode | Use the medcode to link to the medical table to find the read code.     Use the [SOURCE_TO_SOURCE](https://github.com/OHDSI/ETL-LambdaBuilder/blob/master/docs/Standard%20Queries/SOURCE_TO_SOURCE.sql) query to map the read code to a source concept id with the following filters:<br><br> Where source_vocabulary_id = 'Read' <br><br>*BE CAREFUL - READ CODES ARE CASE SENSITIVE*. If there is no mapping available set source_concept_id to zero. | |
-| type_concept_id |  | Use **32842** - EHR referral record |  |
+| type_concept_id |  | Use **32817** - EHR |  |