Declaration of interests

DWB reports personal fees from Relyens, personal fees and equity from AESOP, personal fees and equity from FeelBetter, and personal fees and equity from Guided Clinical Solutions, outside the submitted work. RDU reports grants from National Institutes of Health, outside the submitted work. PZ reports grants from National Institute of Allergy and Infectious Diseases, National Institute of General Medical Sciences, National Cancer Institute, and National Library of Medicine, outside the submitted work. The other authors declare no competing interests.