Harrison M, Rigby D, Vass C, Flynn T, Louviere J, Payne K. Risk as an attribute in discrete choice experiments: a systematic review of the literature. Patient. 2014 Jun;7(2):151-70. doi: 10.1007/s40271-014-0048-1
Sabate M, Pacheco JF, Ballarín E, Ferrer P, Petri H, Hasford J, Schoonen MW, Rottenkolber M, Fortuny J, Laporte JR, Ibanez L. A compilation of research working groups on drug utilisation across Europe. BMC Res Notes. 2014;7:143.