Greenhalgh Trisha, Thorne Sally, Malterud Kirsti
Department of Primary Care Health Sciences, University of Oxford, Oxford, UK.
School of Nursing, University of British Colombia, Vancouver, Canada.
Eur J Clin Invest. 2018 Jun;48(6):e12931. doi: 10.1111/eci.12931. Epub 2018 Apr 16.
