What were the methodological limitations of the studies?
The methodological limitations of the studies were rated serious overall. Two studies were rated moderate limitations: one due to limitations in context, the role of researcher and data analysis, and another study due to missing information on the topic guide and the lack of data richness in sections relevant to this review. Three studies were rated serious limitations due to a lack of information on the role of the researcher, data richness as well as lack of rigour in research methods.