Janssens R, Lang T, Vallejo A, Galinsky J, Plate A, Morgan K, Cabezudo E, Silvennoinen R, Coriu D, Badelita S, Irimia R, Anttonen M, Manninen RL, Schoefs E, Vandebroek M, Vanhellemont A, Delforge M, Stevens H, Simoens S, Huys I. Patient preferences for multiple myeloma treatments: a multinational qualitative study. Front Med (Lausanne). 2021 Jul 6;8:686165. doi: 10.3389/fmed.2021.686165
Watson V, Ryan M. Exploring preference anomalies in double bounded contingent valuation. J Health Econ. 2007 May 1;26(3):463-82. doi: 10.1016/j.jhealeco.2006.10.009