@misc{1294531,
  author = {Mary Bedner and Katrice Lippa and Susan Tai},
  title = {Results from the NIST/NIH Vitamin D Metabolites Quality Assurance Program: Five Years of Comparability Studies},
  year = {2013},
  month = {2013-08-24 04:08:00},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=917723},
  language = {en},
}