Author S. Weir M. Samnaliev T. Kuo Ni Choitir T. Tierney D. Cumming J. Bruce A. Manca R. Taylor S. Eldabe Year of Publication 2017 DOI 10.1136/bmjopen-2017-017585 DOIGoogle ScholarBibTeXEndNote X3 XMLEndNote 7 XMLEndnote taggedMarcRIS