Conflict of interest statement: Y.D. is developing natural health products to overcome a high MAO-A state in early postpartum. J.H.M. has received operating grant funding for other studies from Eli Lilly, GlaxoSmithKline, Bristol-Myers Squibb, Lundbeck, SK Life Science, and Johnson & Johnson/Janssen in the past 5 years. J.H.M. has served as a consultant for all of these companies except Johnson & Johnson, as well as for Sepracor, Trius Therapeutics, and Mylan Inc. None of these companies participated in the funding, design, or execution of this study or preparation of the manuscript. J.H.M. is developing natural health products to treat high-risk states for major depressive episode, and is listed as the inventor on a patent application for this dietary supplement. J.H.M. is applying for patents to implement measures using MAO to diagnose or treat mood disorders and to use peripheral measures as surrogate measures for brain inflammation. Z.V.S. receives royalties from Guilford Press for books related to mindfulness-based cognitive therapy and fees for training workshops. He also serves on the advisory board of MindfulNoggin, part of NogginLabs, a private company specializing in customized web-based learning. D.E.S. is a member of the scientific advisory board for the Cymbalta (duloxetine) Pregnancy Registry for Eli Lilly. She is a co-author of UpToDate chapters on antidepressant drugs during pregnancy and their effects on exposed infants. A.V.R. and M.S. do not have any conflicts of interest related to this work.