---------------------------------------------------------------------------------------------------------------Health Sciences Faculty - Medical University of Białystok Białystok, May 09, 2013 Editor Saudi Medical Journal Riyadh Military Hospital PO Box. 7897, Riyadh 11159 Saudi Arabia Cover letter We would like to submit the attached original article under title: Effect of BMI on quality of life (QOL) and depression levels after bariatric surgery - for consideration for publication in Saudi Medical Journal. We attest that each authors has made an important scientific contribution to the study and has assisted with the drafting or revising of the manuscript and confirm that neither the manuscript nor any part of it has been published or is under consideration for publication elsewhere and agree to it being submitted to the journal and obtain our approval before submitting any revisions. Upon releasing the publication, the undersigned authors shall transfer to the Publisher all the copyrights. The are no conflicts of interest. On behalf of the remaining authors Regina Sierżantowicz
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