Correspondence and reprints to:
Berna Akinci Ozyurek
Department of Chest Disease, University of Health Sciences Ankara Atatürk Chest Diseases and Chest Surgery Training and Research Hospital, Ankara-Turkey.
Phone: +90 554419103, Fax: +90 312 5677700
E-mail: drberna_1982@yahoo.com
This study is not under consideration by any other journal at the same time and that it has not been accepted for publication elsewhere, in any language. I attest that this paper has been read and approved by all co-authors, and there is no conflict of interest to declare.