YL, PL: data collection, financial support, critical revision and final approval of the manuscript.
YZ, FZ: conception and design, data collection, financial support, critical revision and final approval of the manuscript.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-230X/11/104/prepub Authank theNational Institute of Health Health Research NIHR and Tehran University of Medical Scienceses for their support in data collection, financial support and collaboration in this study.
"In essence, the federal guidelines wanted the states to function as collection agencies, recovering financial support from parents who had willfully abandoned their parental responsibilities to their children.
AEK: data collection and analysis, financial support, critical revision and final approval of the manuscript.
MES Strategy desing, drafted the manuscript, obtained the tissue collection and the financial support, performed the statistical analysis.
ZGL, conception and design, data collection and analysis, financial support, manuscript writing, final approval, and responsibility for the manuscript.
DD developed proposal and secured financial support, data collection, laboratory working, analysis of the result, finalizing whole manuscript for publication.
The pre-publication history for this paper can be accessed here: http://www.biomedcentral.com/1471-2474/12/54/prepub We acknowledge Abbott Laboratories for financial support regarding collection of the radiographs and dxr-analysis.
It offered financial support for data collection.
Conception and design: IdSS, BHS, ZA, VM; financial support: IdSS, VM; collection of data: ZA, BHS, SMM, IdSS; data analysis: ZA, KW, BHS, PAW; production of first draft of the manuscript: ZA, KW, IdSS; data interpretation and contribution to final version of the manuscript: all authors.
