Default options in advance directives: study protocol for a randomised clinical trial
Nicole B Gabler, Elizabeth Cooney, Dylan S Small, Andrea B Troxel, Robert M Arnold, Douglas B White, Derek C Angus, George Loewenstein, Kevin G Volpp, Cindy L Bryce, Scott D Halpern
BMJ Open Jun 2016, 6 (6) e010628; DOI: 10.1136/bmjopen-2015-010628