1. Cochrane Netherlands and Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands (P.H., J.B.R., J.A.D., R.J.S., K.G.M., L.H.)
2. Centre for Statistics in Medicine, Botnar Research Centre, University of Oxford, and National Institute for Health Research Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford, United Kingdom (G.S.C.)
3. Centre for Statistics in Medicine, Botnar Research Centre, University of Oxford, Oxford, United Kingdom (D.G.A.)