RT Journal Article SR Electronic T1 Obstacles to research on the effects of interruptions in healthcare JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP bmjqs-2015-004083 DO 10.1136/bmjqs-2015-004083 A1 Tobias Grundgeiger A1 Sidney Dekker A1 Penelope Sanderson A1 Birgit Brecknell A1 David Liu A1 Leanne M Aitken YR 2015 UL http://qualitysafety.bmj.com/content/early/2015/12/09/bmjqs-2015-004083.abstract AB