University of Texas Southwestern Medical Center; Dallas, Texas
Financial Disclosure: Money has been paid to Dr. Cunningham's institution by McGraw Hill (original article was prepared as an appendix of laboratory values for the Williams Obstetrics textbook revision, 23rd edition) and production money supplied as a grant to the University of Texas Southwestern Medical Center to reimburse for secretarial help, etc. He receives royalties from textbooks and some online derivatives that include the 8th through 23rd editions, 1st and 2nd editions of Operative Obstetrics, as well as manuals and study guides derived from Williams Gynecology, 1st edition, and online derivatives. He has received royalties from Elsevier for the 2nd and 3rd editions of Chelsey's Hypertensive Disorders in Pregnancy. The other authors did not report any potential conflicts of interest.