Author contributions
DGS
MCF contributed to statistical analysis, interpretation of data and writing of the manuscript. DGS contributed to acquisition and analysis of data and critical review of the manuscript for important intellectual content. JJBA contributed to the acquisition of data, provided administrative, technical and material support and reviewed the manuscript for important intellectual content. AM contributed to acquisition of data, administrative support and provided a critical review of the manuscript for important intellectual content. TKB contributed to acquisition of data, administrative support and provided a critical review of the manuscript for important intellectual content. BHM contributed to the acquisition and analysis of data and provided a critical review of the manuscript for important intellectual content. BMM contributed to the acquisition and analysis of data and provided a critical review of the manuscript for important intellectual content. SPC contributed to statistical analysis and provided a critical review of the manuscript for important intellectual content. CJS contributed to administrative support and provided supervision and a critical review of the manuscript for important intellectual content. CAL contributed to the acquisition, analysis and interpretation of data and drafting of the manuscript and provided supervision and administrative and technical support. CLR contributed to the acquisition, analysis and interpretation of data and drafting of the manuscript and provided supervision and administrative support.