3.5. Data collection

Data were collected using both an online version of the questionnaire (employees with or without a personal email‐address) and a written version available in German, French and Italian. A contact person for each organization was involved in the distribution of the questionnaire in their organization and ensured that it was available to all health professionals. Participation by the organizations as well as health professionals was on a voluntary basis. They also received a reminder email or postcard 2 weeks later. Healthcare employees could complete the questionnaire between September 2017–March 2018. The questionnaire required 20–45 min to complete.