Methods
Participants
In this qualitative study focus group discussions were used for data collection. To ensure sufficient diversity of opinion, students from the second till fifth year of university from different study disciplines were recruited using snowball sampling, a purposive nonprobability approach that is often used in qualitative research and in which the researcher recruits a few volunteers who, on their turn, recruit other volunteers. No first year students were included because of their ‘limited’ experience as a university student. The aim was to recruit between six and ten participants per focus group. An over-recruitment of one or two participants was pursued in case there were ‘no-shows’.