Gardner, T. and Berk, B. (2015 April 1 Updated). Acute Pancreatitis. Medscape Drugs and Diseases. Available online at http://emedicine.medscape.com/article/181364-overview. Accessed on 9/05/16.

(2016 August Updated). Pancreatitis, Chronic - Chronic Pancreatitis. ARUP Consult. Available online at https://arupconsult.com/content/pancreatitis-chronic/?tab=tab_item-2. Accessed on 9/05/16.

Al-Kaade, S. (2016 August 3 Updated). Exocrine Pancreatic Insufficiency. Medscape Drugs and Diseases. Available online at http://emedicine.medscape.com/article/2121028-overview. Accessed on 9/05/16.

Duggan, S. et al (2016 February 21). Chronic pancreatitis: A diagnostic dilemma. World J Gastroenterol 22(7): 2304–2313. Available online at http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4735004/. Accessed on 9/05/16.

Afghani, E. (2015). Introduction to Pancreatic Disease: Chronic Pancreatitis. Pancreapedia: Exocrine Pancreas Knowledge Base, DOI: 10.3998/panc.2015.3. Available online at http://www.pancreapedia.org/reviews/introduction-to-pancreatic-disease-chronic-pancreatitis. Accessed on 9/05/16.

Kellerund, J. and Layer, P. (2015). Diagnosis of pancreatic exocrine insufficiency in chronic pancreatitis. Pancreapedia: Exocrine Pancreas Knowledge Base, DOI: 10.3998/panc.2015.37. Available online at http://www.pancreapedia.org/reviews/diagnosis-of-pancreatic-exocrine-insufficiency-in-chronic-pancreatitis. Accessed on 9/05/16.

© 2016 Quest Diagnostics. Chymotrypsin, Stool. Available online at http://www.questdiagnostics.com/testcenter/TestDetail.action?tabName=OrderingInfo&ntc=11235. Accessed November 2016.

(January 2008) Genetics Home Reference. CFTR gene, cystic fibrosis transmembrane conductance regulator. Available online at https://ghr.nlm.nih.gov/gene/CFTR#conditions. Accessed November 2016.

Thomas, Clayton L., Editor (1997). Taber's Cyclopedic Medical Dictionary. F.A. Davis Company, Philadelphia, PA [18th Edition].

Pagana, Kathleen D. & Pagana, Timothy J. (2001). Mosby's Diagnostic and Laboratory Test Reference 5th Edition: Mosby, Inc., Saint Louis, MO.

NIDDK (July 1997). Cystic Fibrosis Research Directions. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) [NIH Publication No. 97-4200]. Available online at http://www.niddk.nih.gov/health/endo/pubs/cystic/cystic.htm.

Cystic Fibrosis Foundation. Sweat Testing Procedure and Commonly Asked Questions. [On-line information]. Available online at http://www.cff.org/publications01.htm.

Tait, J., et. al. (26 March 2001). Cystic Fibrosis. GENEReviews [On-line information]. Available online at http://www.genetests.org/.

Mayo Clinic (2001, February 09). What is Cystic Fibrosis? Mayo Clinic [On-line information]. Available online at http://www.mayoclinic.com/invoke.cfm?objectid=2CEBF76F-D36A-4D15-B937BFF91AB51438.

MEDLINEplus (2002, January 2, Updated). Cystic Fibrosis. MedlinePlus Health Information [On-line Information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000107.htm.

MEDLINEplus (2002, January 2, Updated). Sweat Electrolytes. MedlinePlus Health Information [On-line Information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003630.htm.

MEDLINEplus (2002, January 2, Updated). Trypsin and chymotrypsin in stool. MedlinePlus Health Information [On-line Information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003594.htm.

Mountain States Genetics (1999, September, Revised). Cystic Fibrosis (CF). Newborn Screening Practitioner's Manual [On-line information]. Available online at http://www.mostgene.org/pract/prac26.htm.

National Institutes of Health (1995, November). Facts About Cystic Fibrosis. National Heart, Lung, and Blood Institute NIH Publication No. 95-3650 [On-line information]. Available online at http://www.nhlbi.nih.gov/health/public/lung/other/cf.htm.

Quest Diagnostics NEWS (2002, Winter). What is the Best Test to Screen for Cystic Fibrosis? [On-line serial]. PDF available for download at http://www.questdiagnostics.com/hcp/files/02winter_newsletter.pdf.

MEDLINEplus (2002, January 2, Updated). Neonatal cystic fibrosis screening. MedlinePlus Health Information [On-line Information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003409.htm.

Drkoop (2001). Cystic fibrosis. Medical Encyclopedia [On-line information]. Available online at http://www.drkoop.com/conditions/ency/article/000107.htm.

MEDLINEplus (2002, January 2, Updated). Trypsinogen. MedlinePlus Health Information [On-line Information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003560.htm.

Biomedical Hypertext (1999 May 20, last update). Exocrine Secretions of the Pancreas. Colorado State University [On-line information]. Available online at http://arbl.cvmbs.colostate.edu/hbooks/pathphys/digestion/pancreas/exocrine.php.

UPCMD (1998 – 2002). Cystic Fibrosis. University Pathology Consortium, LLC [On-line information]. Available online at http://www.upcmd.com/dot/examples/00218/description.html.

Sainato, D., (2002, March). Genetic Testing for CF Going Mainstream? Clinical Laboratory News [Journal], Vol 28.

Peter Jacky, PhD, FACMG. Director of Cytogenetics and Molecular Genetics, Airport Way Regional Laboratory, Portland, OR.

Wu, A. (2006). Tietz Clinical Guide to Laboratory Tests, Fourth Edition. Saunders Elsevier, St. Louis, Missouri. Page 1088.

(Update May 5, 2007) Lehrer, J. MedlinePlus Medical Encyclopedia. Trypsin and Chymotrypsin in Stool. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003594.htm. Accessed January 2009.

Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. Burtis CA, Ashwood ER, Bruns DE, eds. St. Louis: Elsevier Saunders; 2006, p 622-623.

Wu, A. (2006). Tietz Clinical Guide to Laboratory Tests, Fourth Edition. Saunders Elsevier, St. Louis, Missouri. 1088-1091.

Cystic Fibrosis Foundation. Testing for Cystic Fibrosis. Available online at http://www.cff.org/AboutCF/Testing/. Accessed January 2009.

Cleveland Clinic. Cystic Fibrosis. Available online at http://my.clevelandclinic.org/disorders/cystic_fibrosis/hic_cystic_fibrosis.aspx#. Accessed January 2009.

Denise I. Quigley, PhD, FACMG. Co-Director Cytogenetics/Molecular Genetics, Airport Way Regional Laboratory, Portland, OR.

Peter Jacky, PhD, FACMG. Director of Cytogenetics and Molecular Genetics, Airport Way Regional Laboratory, Portland, OR.

Dugdale, D. (Updated 2011 February 4). Trypsin and chymotrypsin in stool. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/003594.htm. Accessed August 2012.

(© 2012). Cystic Fibrosis. Cedars-Sinai [On-line information]. Available online at http://www.cedars-sinai.edu/Patients/Health-Conditions/Cystic-Fibrosis.aspx. Accessed September 2012.

Rosenstein, B. (Revised 2008 August). Cystic Fibrosis. Merck Manual Home Health Handbook [On-line information]. Available online at http://www.merckmanuals.com/home/childrens_health_issues/cystic_fibrosis_cf/cystic_fibrosis.php. Accessed September 2012.

Kaneshiro, N. (2012 May 16). Cystic fibrosis. MedlinePlus Medical Encyclopedia [On-line information]. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/000107.htm. Accessed August 2012.

Huffman, J. et. al. (Updated 2012 March 8). Chronic Pancreatitis. Medscape Reference [On-line information]. Available online at http://emedicine.medscape.com/article/181554-overview. Accessed August 2012.

(© 1995-2012). Trypsin, Fecal. Mayo Clinic Mayo Medical Laboratories [On-line information]. Available online at http://www.mayomedicallaboratories.com/test-catalog/Overview/57317. Accessed September 2012.

Timothy S. Uphoff, Ph.D., D(ABMG), MLS(ASCP)^CM.  Section Head Molecular Pathology Laboratory, Marshfield Labs, Marshfield Clinic, Marshfield WI.