HemmingKTaljaardMMarshallT, et al. Stepped-wedge trials should be classified as research for the purpose of ethical review. Clin Trials2019; 16(6): 580–588.
2.
KingGGakidouEImaiK, et al. Public policy for the poor? A randomised assessment of the Mexican universal health insurance programme. Lancet2009; 373(9673): 1447–1454.
3.
BaickerKTaubmanSLAllenHL, et al. The Oregon experiment: effects of Medicaid on clinical outcomes. N Engl J Med2013; 368(18): 1713–1722.
4.
McKenzieDStillmanSGibsonJ. How important is selection? Experimental vs. non-experimental measures of the income gains from migration. J Eur Econ Assoc2010; 8: 913–945.
5.
WatsonSIDixon-WoodsMTaylorCA, et al. Revising ethical guidance for the evaluation of programmes and interventions not initiated by researchers. J Med Ethics2020; 46: 26–30.
6.
SchmidtkeKANightingalePGReevesK, et al. Randomised controlled trial of a theory-based intervention to prompt front-line staff to take up the seasonal influenza vaccine. BMJ Qual Saf. Epub ahead of print 5 August 2019. DOI: 10.1136/bmjqs-2019-009775.