Responsive caregiving: conceptual clarity and the need for indicators.

Competing Interests: We declare no competing interests. We thank Linda M Richter for her valuable comments and the US Agency for International Development for their financial support of the Child Health Accountability Tracking group (US Department of State [68023]). The authors alone are responsible for the views expressed in this article and they do not necessarily represent the views, decisions, or policies of the institutions with which they are affiliated. Members of the Child Health Accountability Tracking Technical Advisory Group are listed in the appendix.