A qualitative analysis of the interview transcriptions
was performed. Suggestions for modification of
the guideline were assigned a level indicating the
necessity for modification (level 1: compulsory; level
2: will improve the guideline; level 3: suggested but
not required). Members of the expert panel could
review suggestions made by all other panel members
and provide feedback on the modifications as proposed
by the authors. Based on feedback of the expert
panel, a revised version of the guideline was prepared
for the pilot study. The same panel of experts
reviewed the final version of the guideline, which
included modifications based on results from the
pilot study