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It has been previously shown that myocardial contrast echocardiography is a valuable technique for delineating regions of myocardial underperfusion secondary to coronary occlusion and to critical coronary stenoses in the presence of hyperemic stimulation .
 Disease: coronary occlusion; Disease: coronary stenoses; Disease: hyperemic
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: coronary occlusion; Disease: coronary stenoses; Disease: hyperemic