A harmonized guidance is needed on how to "properly" frame review questions to make the best use of all available evidence in the assessment of effectiveness of complex interventions
1 Department of Social Policy and Intervention, Centre for Evidence-Based Intervention, University of Oxford, Barnett House, 32 Wellington Square, Oxford OX1 2ER, UK. Electronic address: ani.movsisyan@spi.ox.ac.uk.
2 Warwick Evidence, Division of Health Sciences, Warwick Medical School, University of Warwick, Coventry CV4 7AL.
3 Department of Social Policy and Intervention, Centre for Evidence-Based Intervention, University of Oxford, Barnett House, 32 Wellington Square, Oxford OX1 2ER, UK.