Received: 22 April 2019
Accepted: 19 September 2019
First Online: 30 October 2019
: EFFECTS has approval from the ethics board 30th September 2013 (reg. no. 2013/1265–31/2); this study WIMSS-q 2017/1284–31/1 was approved 9th August 2017. The questionnaire was sent electronically by SurveyMonkey, an online survey tool, to all physicians and nurses who were actively involved in the EFFECTS trial, i.e., those listed in the delegation log at the time. Participation in the questionnaire was voluntary and the participants did not need to give any reason why they did not want to answer. None of the questions required mandatory answers.
: The authors declare that they have no competing interests.