Is p-tert-butylphenol-formaldehyde resin (PTBP-FR) in TRUE Test (R) (Mekos test) sensitizing the tested patients?
Background. In a population study using TRUE Test (R), we noted late reactions to p-tert-butylphenol-formaldehyde resin (PTBP-FR) in 0.5% of subjects tested. Objectives. In order to explore possible test sensitization, differences in the contents of sensitizers within PTBP-FR in test preparations for TRUE Test (R) and Finn Chambers (R) were analysed. Subjects allergic to PTBP-FR and subjects with
