2015 review performed by Boris Calderon, MD, DABCC, FACB, Staff Scientist, Clinical Center NIH.

Bizzaro, N., & Antico, A. (2014). Diagnosis and classification of pernicious anemia. Autoimmun Rev, 13(4-5), 565-568. doi: 10.1016/j.autrev.2014.01.042.

Osborne, D., & Sobczynska-Malefora, A. (2015). Autoimmune mechanisms in pernicious anaemia & thyroid disease. Autoimmun Rev, 14(9), 763-768. doi: 10.1016/j.autrev.2015.04.011.

Toh, B. H., van Driel, I. R., & Gleeson, P. A. (1997). Pernicious anemia. N Engl J Med, 337(20), 1441-1448. doi: 10.1056/NEJM199711133372007.

(September 2, 2015.) Schrier, SL. Diagnosis and treatment of vitamin B12 and folate deficiency. In: UpToDate, Timauer JS (Ed). UpToDate, Waltham, MA. Available online through http://www.uptodate.com. Accessed on September 2, 2015.

Pagana, K. D. & Pagana, T. J. (© 2011). Mosby's Diagnostic and Laboratory Test Reference 10th Edition: Mosby, Inc., Saint Louis, MO. Pp 592-593.

(Revised 2011 April). Pernicious Anemia. National Heart Lung and Blood Institute [On-line information]. Available online at http://www.nhlbi.nih.gov/health/dci/Diseases/prnanmia/prnanmia_what.html through http://www.nhlbi.nih.gov. Accessed August 2011.

Chen, Y. (Updated 2010 January 31). Lack of Intrinsic Factor. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/001155.htm. Accessed August 2011.

Vorvick, L. (Updated 2010 January 31). Intrinsic factor. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/002381.htm. Accessed August 2011.

Frank, E. et. al. (Updated 2010 September). Megaloblastic Anemia. ARUP Consult [On-line information]. Available online at http://www.arupconsult.com/Topics/Megaloblasticanemia.php through http://www.arupconsult.com. Accessed July 2011.

(© 1995–2011). Unit Code 9335: Intrinsic Factor Blocking Antibody, Serum. Mayo Clinic Mayo Medical Laboratories [On-line information]. Available online at http://www.mayomedicallaboratories.com/test-catalog/Overview/9335 through http://www.mayomedicallaboratories.com. Accessed July 2011.

Mayo Clinic Staff (2011 March 4). Vitamin Deficiency Anemia. MayoClinic.com [On-line information]. Available online at http://www.mayoclinic.com/health/vitamin-deficiency-anemia/DS00325/METHOD=print through http://www.mayoclinic.com. Accessed July 2011.

(Reviewed 2011 June 24). Dietary Supplement Fact Sheet: Vitamin B12. NIH Office of Dietary Supplements [On-line information]. Available online at http://ods.od.nih.gov/factsheets/VitaminB12-QuickFacts/ through http://ods.od.nih.gov. Accessed August 2011.

(Reviewed 2011 April 4). Vitamin B12. MedlinePlus Drug Information [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/druginfo/natural/926.html through http://www.nlm.nih.gov. Accessed August 2011.

Schick, P. (Updated 2011 May 26). Megaloblastic Anemia. Medscape Reference [On-line information]. Available online at http://emedicine.medscape.com/article/204066-overview through http://emedicine.medscape.com. Accessed August 2011.

Conrad, M. (Updated 2011 May 26). Pernicious Anemia. Medscape Reference [On-line information]. Available online at http://emedicine.medscape.com/article/204930-overview through http://emedicine.medscape.com. Accessed August 2011.

Dugdale, D. (Updated 2008 November 23). Pernicious anemia. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000569.htm. Accessed August 2011.

Chen, Y. (Updated 2010 January 31). Anemia – B12 deficiency. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000574.htm. Accessed August 2011.

OH, R. and Brown, D. (2003 March 1). Vitamin B12 Deficiency. Am Fam Physician. 2003 Mar 1;67(5):979-986. [On-line information]. Available online at http://www.aafp.org/afp/2003/0301/p979.html through http://www.aafp.org. Accessed August 2011.

Wu, A. (© 2006). Tietz Clinical Guide to Laboratory Tests, 4th Edition: Saunders Elsevier, St. Louis, MO. Pp 632-633.

Henry's Clinical Diagnosis and Management by Laboratory Methods. 21st ed. McPherson R, Pincus M, eds. Philadelphia, PA: Saunders Elsevier: 2007 Pp 508-509.

Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. Burtis CA, Ashwood ER, Bruns DE, eds. St. Louis: Elsevier Saunders; 2006, Pp 1103.