The ethical implications of this project have been carefully considered . While this research did not present particular ethical implications , best practices have been followed in order to inform the participants and protect the data and integrity of the interviewees . Participation was voluntary and the interviewees were given a plain language document with information about the project . The interviewees were furthermore required to give written informed consent to participate in the study and have been given the possibility to withdraw at any time . Our data have been processed in a manner that ensures appropriate security of personal data , including protection against unauthorised or unlawful processing and against accidental loss , destruction or damage of data , using appropriate technical or organisational measures . To provide maximum confidentiality , we have anonymised the information that all the interviewees provided .