- Use of CD63 expression as a marker of in vitro basophil activation and leukotriene determination in metamizol allergic patients. Gamboa, P.M., Sanz, M.L., Caballero, M.R., Antépara, I., Urrutia, I., Jáuregui, I., González, G., Diéguez, I., De Weck, A.L. Allergy (2003)