- Monoclonal antibodies against Olea europaea major allergen: allergenic activity of affinity-purified allergen and depleted extract and development of a radioimmunoassay for the quantitation of the allergen. Lombardero, M., Quirce, S., Duffort, O., Barber, D., Carpizo, J., Chamorro, M.J., Lezaun, A., Carreira, J. J. Allergy Clin. Immunol. (1992)