on an a priori classification of research methods. In this respect, the interpretation
of the methods adopted by the papers studied is itself interpretative. This was
necessary as some authors did not unambiguously state their adopted methods. The
qualitative methods adopted by the authors comprised interviews (semi-structured
and unstructured), focus groups and group interviews, observation (non-participatory
and/or participatory including ethnography), document or other textual analysis and
visual data analysis.