@misc{29156,
  author = {Katrice Lippa and Mary Bedner and Susan Tai},
  title = {NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results: Summer 2011 Exercise (Exercise 4)},
  year = {2012},
  month = {2012-12-21},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.7893},
  language = {en},
}