@article{sieber2010-20042557,
  author  = {Sieber, F. E. and Zakriya, K. J. and Gottschalk, A. and Blute, M. R. and Lee, H. B. and Rosenberg, P. B. and Mears, S. C.},
  title   = {{Sedation depth during spinal anesthesia and the development of postoperative delirium in elderly patients undergoing hip fracture repair}},
  journal = {Mayo Clinic proceedings},
  year    = {2010},
  doi     = {10.4065/mcp.2009.0469},
  pmid    = {20042557},
  url     = {https://doi.org/10.4065/mcp.2009.0469}
}