Received: 26 July 2017
Accepted: 16 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: The research has been performed in accordance with the declaration of Helsinki. As this retrospective analysis consists of anonymised clinical routine data, the Research Ethics Committee deems the application for and issue of an Ethics approval not necessary.All the data were anonymised before the author started research (had access to the data).All the patients gave a written consent to the use of data for research.Name of Ethics committee: Ethics Committee in Cracov, ul Krupnicza 11a 31-123 Cracov, tel. + 48126191712, fax + 48124225755.
: Manuscript does not contains any individual person’s data.
: The author declares that he has no competing interests.
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