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. 2018 Jun 27;18:496. doi: 10.1186/s12913-018-3299-z

Fig. 1.

Fig. 1

Hierarchy chart presenting all discussed topics about criteria understanding and relevance. Legend: Rectangle size represents how heavily the topic was discussed according to the number of citations. Light blue – the content of decision-making criteria; dark blue – criteria relevance; white – supportive themes