waar [pharm:ingredient [@classCode='MMAT'] [pharm:code [@codeSystem = '2.16.840.1.113883.2.4.4.1'
or @codeSystem = '2.16.840.1.113883.2.4.4.7' or @codeSystem = '2.16.840.1.113883.2.4.4.8'
or @codeSystem = '2.16.840.1.113883.2.4.4.10' or @nullFlavor]]]