Implications of placebo and nocebo effects for clinical practice: expert consensus অনুযায়ী Evers, A, Colloca, L, Blease, C, Annoni, M, Atlas, L, Benedetti, F, Bingel, U, Büchel, C, Carvalho, C, Colagiuri, B, Crum, A, Enck, P, Gaab, J, Geers, A, Howick, J, Jensen, K, Kirsch, I, Meissner, K, Napadow, V, Peerdeman, K, Raz, A, Rief, W, Vase, L, Wager, T, Wampold, B, Weimer, K, Wiech, K, Kaptchuk, T, Klinger, R, Kelley, J