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Let incoming_retic_value: PQ = observations->select(observationCode.implies(retic_LN).value)
                                           ->sortedBy(dateTime).last().value.oclAsType(PQ)

--do Booleans or Tests
Let highRetics: Boolean = If incoming_retic_value.oclIsDefined() then 
                             if incoming_retic_value > PQ{value = 180100, unit = ''10*9/L}
                              then true
                             else false endif
                           else false endif   

-- prepare comment
Let commentCode:CD =CD{code = '8251-1', codeSystem = '2.16.840.1.113883.6.1', codeSystemName ='LOINC', displayName = ST{value='Comment'}}
Let highReticsCommentObs: Observation = Observation{observationCode = commentCode,
  value = ST{value = 'Raised reticulocytes, consider haemolytic anaemia and blood loss as causes.'}
                                               }
 -- result

Let result:Sequence(Observation)
        = Sequence{highReticsCommentObs
                   }
 result
m of a ne
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