the most frequent allergen in 114 cases of eczema of the hands in medical personnel between 1976 and 1980 at the department of dermatology and allergology of the municipal hospital schwabing in munich was formaldehyde in 24 instances ( i.e . 21 % ) , thiuram mix in 18 ( i.e . 16 % ) and nickel sulfate in 15 ( i.e . 13 % ) .
C0002092
allergen
C0016564
formaldehyde