Binz, Tina M.
Gaehler, Franziska
Voegel, Clarissa D.
Hofmann, Mathias
Baumgartner, Markus R.
Kraemer, Thomas
Article History
Received: 28 March 2018
Revised: 27 April 2018
Accepted: 4 May 2018
First Online: 17 May 2018
Compliance with ethical standards
: All participants from whom hair and nail samples were obtained gave informed oral consent. The study has been approved by the ethics committee of the canton Zurich (BASEC-Nr. 2016-00057) and has been performed in accordance with the ethical standards.
: The authors declare that they have no conflict of interest.