Induction of coronary artery spasm by acetylcholine in patients with variant angina: possible role of the parasympathetic nervous system in the pathogenesis of coronary artery spasm - Yasue, H; Horio, Y; Nakamura, N; Fujii, H; Imoto, N; Sonoda, R; Kugiyama, K; Obata, K; Morikami, Y; Kimura, T (Circulation, 1986)