Can patch testing with methylchloroisothiazolinone/methylisothiazolinone be optimized using a new diagnostic mix? - A multicenter study from the Swedish Contact Dermatitis Research Group.

The results speak in favor of replacing the preparations MCI/MI 0.02% aq. and MI 0.2% aq. with MCI/MI 0.215% aq. as the screening substance in the Swedish baseline series, which has been implemented in 2020.