Atkins, S; Lewin, S; Smith, H; Engel, M; Fretheim, A; Volmink, J; (2008) Conducting a meta-ethnography of qualitative literature: Lessons learnt. BMC medical research methodology, 8. ISSN 1471-2288 DOI: https://doi.org/10.1186/1471-2288-8-21