Intersection of http://terminology.hl7.org/CodeSystem/W4 and http://terminology.hl7.org/CodeSystem/W4
This is the CodeSystem that contains codes in both WHO rec# code with ASTM extension (http://terminology.hl7.org/CodeSystem/W4) and WHO rec# code with ASTM extension (http://terminology.hl7.org/CodeSystem/W4).