Robertson G, Fleming A, Williams MC, Trucco E, Quinn N, Hogg R, McKay GJ, Kee F, Young I, Pellegrini E, Newby DE, van Beek EJR, Peto T, Dhillon B, van Hemert J, MacGillivray TJ. Association between hypertension and retinal vascular features in ultra-widefield fundus imaging. Open Heart. 2020 Jan 8;7(1):e001124. doi: 10.1136/openhrt-2019-001124
Vass C, Gray E, Payne K. Discrete choice experiments of pharmacy services: a systematic review. Int J Clin Phar. 2016 Jun;38(3):620-30. doi: 10.1007/s11096-015-0221-1