Sheard L, Marsh C. How to analyse longitudinal data from multiple sources in qualitative health research: the pen portrait analytic technique. BMC Medical Research Methodology. 2019 2019/08/02;19(1):169.
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Sheard L, Marsh C. How to analyse longitudinal data from multiple sources in qualitative health research: the pen portrait analytic technique. BMC Medical Research Methodology. 2019 2019/08/02;19(1):169.
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