The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2415/14/105/prepub We thank Edanz English Editing for the language editing of our paper.
We thank Claire Gudex for language editing of the manuscript.
The authors are grateful to Ms. Sarah Hancock for language editing from Department of Communications and Agricultural Education, Kansas State Research and Extension.
We would like to thank the American Journal Experts for language editing of our manuscript.
We would also like to acknowledge Ms. Nilufar Shiva for language editing of the manuscript.
We thank Mrs Bin Zhao, from Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing, China, for language editing of the manuscript.
We also thank Lindy Gustavsson and Sofia McGarvey for language editing of the manuscript.
The authors also thank Mr. M. Shamsul Islam Khan, Head, Publication Unit, ICDDR, B, for language editing of the manuscript.
We are thankful to Ross Colgate, Research Specialist, Department of Medicine, The University of Vermont and Prof. Greg Matlashewski, Department of Microbiology and Immunology, McGill University for language editing of the manuscript.
We express our appreciation to the participants of district-13 of Tehran for their enthusiastic support in this study, and would like to acknowledge Ms. Nilufar Shiva for language editing of the manuscript.
