1. Anand, S.: The relationship of ABO, MN, and rhesus blood groups to asthma. Indian J. Chest. Dis. Allied Sci.6, 74 (1964)
2. Bender, K.: Immunglobuline. I. Genetik der Antikörperbildung. In: Humangenetik. Ein kurzes Handbuch in fünf Bänden, P. E. Becker, ed., Vol. I/3, pp 223?243. Stuttgart: Thieme 1975
3. El-Mehairy, M. M., El-Tarabishi, N.: The correlation between ABO blood groups and allergic disorders. Ann. Allergy27, 366 (1966)
4. Filsoufi, J.: Etude statistique des rapports entre les maladies allergiques et les goupes sanguins. Rev. Fr. Allergol.15, 115?117 (1975)
5. Kareemullah, L., Taneja, V., Begum, S., Sarma, P. K. M., Baig, H. A.: Association of ABO blood groups and vitiligo. J. Med. Genet.14, 211?213 (1977)