This is the ValueSet that contains all the codes in NHSN SAFR HRD Supply Day Time Period Ranges Value Set (http://www.cdc.gov/nhsn/fhirportal/safr/ig/ValueSet/nhsn-safr-hrd-supply-days-codes) and NHSN SAFR HRD Supply Day Time Period Ranges Value Set (http://www.cdc.gov/nhsn/fhirportal/safr/ig/ValueSet/nhsn-safr-hrd-supply-days-codes). E.g. what you have to deal with if you get resources containing codes in either of them