de Boer, Nanne K H Paradoxical elevated thiopurine S-methyltransferase activity after pancytopenia during azathioprine therapy: potential influence of red blood cell age. [electronic resource] - Therapeutic drug monitoring Jun 2008 - 390-3 p. digital Publication Type: Journal Article ISSN: 0163-4356 Standard No.: 10.1097/FTD.0b013e31816c20b3 doi Subjects--Topical Terms: AdolescentAzathioprine--adverse effectsBlood Cell CountCrohn Disease--bloodErythrocyte Aging--physiologyErythrocytes--drug effectsFemaleHumansImmunosuppressive Agents--adverse effectsMethyltransferases--bloodPancytopenia--enzymology