The authors neglected to cite a previously-published related paper which reports the use of PEDOT:PSS ink-jet printing to realize nanosheets for skin-contact applications. This is listed below as reference 1, and should appear in the introduction as below:“Thin film based devices19,20, and organic electrochemical transistors21 were also recently proposed for surface sensing applications”.should read:“Thin film based devices19,20, organic electrochemical transistors21 and PEDOT:PSS ink-jet printed nanosheets1, were also recently proposed for surface sensing applications. In the latter example1, PEDOT:PSS electrodes printed onto temporary tattoos were used for EMG recordings”.