Vreeman DJ, Abhyankar S, McDonald CJ.Unit conversions between LOINC codes Published June 19, 2017 [Letter]. Journal of the American Medical Informatics Association, 1–3. http://doi.org/10.1093/jamia/ocx087.
Zarin D.Factual Errors about ClinicalTrials.gov and other federal mandates in special report by Shuster [Letter]. Clin Transl Sci. 2012 Apr;5(2):217; author reply 217. doi: 10.1111/j.1752-8062.2012.00410.x.