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Yasue H, Horio Y, Nakamura N, et al. 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. Circulation 74: 955-963, 1986."},{"key":"2","doi-asserted-by":"crossref","unstructured":"2. Okumura K, Yasue H, Matsuyama K, et al. Sensitivity and specificity of intracoronary injection of acetylcholine for the induction of coronary artery spasm. J Am Coll Cardiol 12: 883-888, 1988.","DOI":"10.1016\/0735-1097(88)90449-4"},{"key":"3","unstructured":"3. Okumura K, Yasue H, Horio Y, et al. Multivessel coronary spasm in patients with variant angina: a study with intracoronary injection of acetylcholine. Circulation 77: 535-542, 1988."},{"key":"4","doi-asserted-by":"crossref","unstructured":"4. Sueda S, Ochi N, Kawada H, et al. Frequency of provoked coronary vasospasm in patients undergoing coronary arteriography with spasm provocation test of acetylcholine. 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Induction of coronary artery spasm by two pharmacological agents: comparison between intracoronary injection of acetylcholine and ergonovine. Coron Artery Dis 15: 451-457, 2003."},{"key":"12","unstructured":"12. Sueda S, Kohno H, Fukuda H, et al. Clinical impact of selective spasm provocation tests: comparisons between acetylcholine and ergonovine in 1508 examinations. Coron Artery Dis 15: 491-497, 2004."},{"key":"13","unstructured":"13. Sueda S, Ochi T, Yano K, et al. New combined spasm provocation test in patients with rest angina: intracoronary injection of acetylcholine after intracoronary administration of ergonovine. Jpn Circ J 64: 559-565, 2000."},{"key":"14","unstructured":"14. Yasue H, Kugiyama K. Coronary spasm: clinical features and pathogenesis. Intern Med 36: 760-765, 1997."},{"key":"15","doi-asserted-by":"crossref","unstructured":"15. Yasue H, Nagao M, Omote S, Takizawa A, Miwa K, Tanaka S. Coronary arterial spasm and Prinzmetal's variant form of angina induced by hyperventilation and Tris-buffer infusion. Circulation 58: 56-62, 1978.","DOI":"10.1161\/01.CIR.58.1.56"},{"key":"16","unstructured":"16. Fujii H, Yasue H, Okumura K, et al. Hyperventilation-induced simultaneous multivessel coronary spasm in patients with variant angina: an echocardiographic and arteriographic study. J Am Coll Cardiol 12: 1184-1192, 1988."},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Crea F, Davies G, Chierchia S, et al. Different susceptibility to myocardial ischemia provoked hyperventilation and cold pressor test in exertional and variant angina pectoris. Am J Cardiol 56: 18-22, 1985.","DOI":"10.1016\/0002-9149(85)90558-2"},{"key":"18","unstructured":"18. Yoshida K, Utsunomiya T, Morooka T, et al. Mental stress test is an effective inducer of vasospastic angina pectoris: comparison with cold pressor, hyperventilation and master two-step exercise test. Int J Cardiol 70: 155-163, 1999."},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Nakao K, Ohgushi M, Yoshimura M, et al. Hyperventilation as a specific test for diagnosis of coronary artery spasm. Am J Cardiol 80: 545-549, 1997.","DOI":"10.1016\/S0002-9149(97)00419-0"},{"key":"20","unstructured":"20. Buxton A, Goldberg S, Hirshfeld JW, et al. Refractory ergonovine-induced coronary vasospasm: importance of intracoronary nitroglycerin. Am J Cardiol 46: 329-334, 1980."},{"key":"21","doi-asserted-by":"crossref","unstructured":"21. Sueda S, Saeki H, Otani T, et al. Major complications during spasm provocation tests with an intracoronary injection of acetylcholine. Am J Cardiol 85: 391-394, 2000.","DOI":"10.1016\/S0002-9149(99)00754-7"},{"key":"22","doi-asserted-by":"crossref","unstructured":"22. Sueda S, Fukuda H, Watanabe K, et al. Clinical characteristics and possible mechanism of paroxysmal atrial fibrillation induced by intracoronary injection of acetylcholine. 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