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
Spector D, Anthony M, Alexander D, Arab L. Soy consumption and colorectal cancer. Nutr Cancer. 2003;47(1):1-12.