Strober B, Sigurgeirsson B, Popp G, Sinclair R, Krell J, Stonkus S, Septe M, Elewski BE, Gottlieb AB, Zhao Y, Herrera V, Mordin M, Odom D, Papavassilis C, Nyirady J, Lebwohl M. Secukinumab provides clearer skin and better control on patient-reported psoriasis symptoms of itching, pain, and scaling than placebo and etanercept. J Psoriasis and Psoriatic Arthritis. 2016;1(4):167-75.
Smith VK, Evans MF, Banzhaf HS, Poulos C. Can weak substitution be rehabilitated? Environ Resour Econ (Dordr). 2010 Feb 1;45(2):203-21.
Mansfield CA, Pattanayak SK, McDow W, MacDonald R, Halpin P. Shades of green: measuring the value of urban forests in the housing market. J Forest Econ. 2005 Dec;11(3):177-99. doi: 10.1016/j.jfe.2005.08.002
Mansfield CA. Despairing over disparities: an empirical analysis of the relationship between willingness-to-pay and willingness-to-accept. Environ Resour Econ (Dordr). 1999;13(2):219-34.