PT - JOURNAL ARTICLE AU - Veronika Williams AU - Anne-Marie Boylan AU - David Nunan TI - Critical appraisal of qualitative research: necessity, partialities and the issue of bias AID - 10.1136/bmjebm-2018-111132 DP - 2020 Feb 01 TA - BMJ Evidence-Based Medicine PG - 9--11 VI - 25 IP - 1 4099 - http://ebm.bmj.com/content/25/1/9.short 4100 - http://ebm.bmj.com/content/25/1/9.full SO - BMJ EBM2020 Feb 01; 25