An exploration of facilitators and challenges in the scale-up of a national, public sector community health worker cadre in Zambia: a qualitative study

<span class="attribute-to-highlight medbox">Phiri</span> <span class="attribute-to-highlight medbox">et</span> al. Human Resources for Health (2017) 15:40 DOI 10.1186/s12960-017-0214-3