Inclusion criteria were age > 18 years, legal capacity, informed consent after the study procedure was explained, as well as willingness and ability to comply with the test protocol. Exclusion criteria were macroscopically visible lesions of the skin except acne juvenilis, infections of the shoulder areas, dermatosis except acne, participation in another study within the last 30 days, pregnancy, lactation, thyroid disorders, intolerance to CHG or iodine, age under 18, therapy with radioactive iodine, antiseptic procedures on the designated areas within in the last 7 days and systemic antibiotics within the last 7 days. Two female volunteers suffered from active acne juvenilis at the shoulder areas that was less pronounced in the face; this was confirmed dermatologically.
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