Disclosure. Acknowledgements: The authors are indebted to Dr. Gerhard Strittmatter (Münster, Germany) for providing the questionnaire and material for the analysis of our results, as well as valuable suggestions during… Click to show full abstract
Disclosure. Acknowledgements: The authors are indebted to Dr. Gerhard Strittmatter (Münster, Germany) for providing the questionnaire and material for the analysis of our results, as well as valuable suggestions during the preparation of this manuscript. We are also indebted to Professor Max Hundeiker (Münster, Germany) for valuable suggestions and discussions during the preparation of this manuscript and to Evangelia Karamountzou for assisting in the translation of the questionnaire. Financial support: This study was partially supported by the Research Committee of the University of Ioannina, Account No 22195. Conflicts of Interest: none.
               
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