For the qualitative part of the study, semi-structured interviews
(see appendix for a topic list) of 45–60 min were held with
managers of the 18 DMP projects (four projects were part of a
qualitative sub-study and followed a different interview schedule
and scheme). Interviews were held at the beginning and end of the
project; one project manager declined the follow-up interview,
which led to a total of 35 interviews.