@article{6fb649ea40e64c2ba4fbec141038d9f9,
title = "How often are interventions in cluster-randomised controlled trials of complex interventions in general practices effective and reasons for potential shortcomings? Protocol and results of a feasibility project for a systematic review.",
author = "Andrea Siebenhofer-Kroitzsch and S Erckenbrecht and Gudrun Pregartner and Andrea Berghold and C Muth",
year = "2016",
doi = "10.1136/bmjopen-2015-009414",
language = "English",
journal = "BMJ Open",
issn = "2044-6055",
publisher = "BMJ Publishing Group",
}