Autoimmunity against the β2 adrenergic receptor and muscarinic-2 receptor in complex regional pain syndrome. by Kohr, D, Singh, P, Tschernatsch, M, Kaps, M, Pouokam, E, Diener, M, Kummer, W, Birklein, F, Vincent, A, Goebel, A, Wallukat, G, Blaes, F