Substitution of general practitioners by nurse practitioners in out-of-hours primary care: a quasi-experimental study

van der Biezen M, Schoonhoven L, Wijers N, van der Burgt R, Wensing M, Laurant M. Substitution of general practitioners by nurse practitioners in out-of-hours primary care: a quasi-experimental study. Journal of Advanced Nursing; 72(8):1813-24. doi: 10.1111/jan.12954. Epub 2016 Mar 11.