1 This article is part of a series on transforming health systems published with support from The Robert Wood Johnson Foundation. This is an open access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt, and build upon this work, for commercial use, provided the original work is properly cited. See https://creativecommons.org/licenses/by/4.0/. Brian Rinker (brianrinker@gmail.com) is an independent journalist in San Francisco, California.