Dermal Profile Analysis Using the NMR-MOUSE

Inclusion Criteria: * Age 18-80 * Dialysis * ability to perform NMR-measurement * Eligibility to sign informed consent * signed informed consent Exclusion Criteria: * implanted cardiac device * implanted cranial device * implanted cochlea device * intrauterine device * other metallic implants * tattoo, any skin disease or scars from surgery (in the area of measurement) * previous skin treatment with cosmetics (of any kind) 24 hours prior to measurement * wearing of earrings, piercings or hearings-aids during measurement * participation in other clinical trials 30 days prior to participation in the SHN study * no written informed consent * any conditions, as determined by the examiner, that excludes the patient from participation in the study * subjects with legal guardian * pregnancy or lactation (a possible pregnancy of a participant before menopause will be excluded before inclusion in the study) * subjects under employment or with any relation to the the sponsor or the investigator * participation in any other study