RT Journal Article SR Electronic T1 COVID-19: we need randomised trials of school closures JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 1078 OP 1079 DO 10.1136/jech-2020-214262 VO 74 IS 12 A1 Atle Fretheim A1 Martin Flatø A1 Anneke Steens A1 Signe Agnes Flottorp A1 Christopher James Rose A1 Kjetil Elias Telle A1 Jonas Minet Kinge A1 Per Everhard Schwarze YR 2020 UL http://jech.bmj.com/content/74/12/1078.abstract AB