Muhib A. Khan	Study concept and design, data acquisition, statistical analysis, interpretation of data and drafting the article
Grayson Baird	Statistical analysis, interpretation of data, critical revision of the manuscript for important intellectual content
David Miller	Data acquisition, critical revision of the manuscript for important intellectual content
Anand Patel	Data acquisition, critical revision of the manuscript for important intellectual content
Shawn Tsekhan	Data acquisition, critical revision of the manuscript for important intellectual content
Shadi Yaghi	Interpretation of data, drafting the article and critical revision of the manuscript for important intellectual content
Ajit Puri	Critical revision of the manuscript for important intellectual content
Mahesh Jayaraman	Critical revision of the manuscript for important intellectual content
Nils Henninger	Study concept, interpretation of data, drafting the article, critical revision of the manuscript for important intellectual content
Brian Silver	Study concept, interpretation of data, drafting the article, critical revision of the manuscript for important intellectual content