- Allergic contact hypersensitivity to nickel, neomycin, ethylenediamine, and benzocaine. Relationships between age, sex, history of exposure, and reactivity to standard patch tests and use tests in a general population. Prystowsky, S.D., Allen, A.M., Smith, R.W., Nonomura, J.H., Odom, R.B., Akers, W.A. Archives of dermatology. (1979)