Table 1. Characteristics of group interviews.

	Group 1	Group 2	Group 3	Group 4
Date	22-6-2020	23-6-2020	30-6-2020	3-7-2020
Participants	4 MREC review officers	4 COVID-19 investigators	4 MREC review officers and 2 MREC chairs	5 COVID-19 investigators
Interviewer	MJPAJ, PhD, male, ethicist MREC, assistant professor of medical ethics, supervised many interview studies	JvdP, MD PhD, male, chair MREC, obstetrician, trained to interview and teach residents and specialists	MJPAJ, PhD, male, ethicist MREC, assistant professor of medical ethics, supervised many interview studies	JvdP, MD PhD, male, chair MREC, obstetrician, trained to interview and teach residents and specialists
Duration	1 hour 4 min	52 min	46 min	54 min