@article{ref1,
  author = "J. P. Jacobs and F. G. Lacour-Gayet and M. L. Jacobs and D. R. Clarke and C. I. Tchervenkov and J. W. Gaynor and T. L. Spray and B. Maruszewski and G. Stellin and J. Gould and R. S. Dokholyan and E. D. Peterson and M. J. Elliott and C. Mavroudis",
  title = "Initial Application in The STS Congenital Database of Complexity Adjustment to Evaluate Surgical Case Mix and Results",
  year = 2005,
  journal = "The Annals of Thoracic Surgery",
  publisher = "Elsevier",
  volume = 79,
  number = 5,
  pages = "1635-1649",
  month = "May",
  doi = "10.1016/j.athoracsur.2004.09.065",
  url = "http://dx.doi.org/10.1016/j.athoracsur.2004.09.065"
}