Tas, M., Leezenberg, J. A., & Drexhage, H. A. (1990). Beneficial effects of the thymic hormone preparation thymostimulin in patients with defects in cell-mediated immunity and chronic purulent rhinosinusitis. A double-blind cross-over trial on improvements in monocyte polarization and clinical effects.

Tas, M., J A. Leezenberg, ja H A. Drexhage. Beneficial Effects of the Thymic Hormone Preparation Thymostimulin in Patients With Defects in Cell-mediated Immunity and Chronic Purulent Rhinosinusitis. A Double-blind Cross-over Trial On Improvements in Monocyte Polarization and Clinical Effects. 1990.

Tas, M., J A. Leezenberg, ja H A. Drexhage. Beneficial Effects of the Thymic Hormone Preparation Thymostimulin in Patients With Defects in Cell-mediated Immunity and Chronic Purulent Rhinosinusitis. A Double-blind Cross-over Trial On Improvements in Monocyte Polarization and Clinical Effects. 1990.