DREISCHULTE, T., GRANT, A., HAPCA, A. and GUTHRIE, B. 2018. Process evaluation of the Data-driven Quality Improvement in Primary Care (DQIP) trial: quantitative examination of variation between practices in recruitment, implementation and effectiveness. BMJ open [online], 8(1), article ID e017133. Available from: https://doi.org/10.1136/bmjopen-2017-017133