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The relation between myocardial beta - adrenergic receptor and left ventricular ( LV ) function was studied in 10 patients , aged 41 to 61 years ( average 51 ) , with LV volume overload mainly due to chronic mitral regurgitation .
 GENE: myocardial beta - adrenergic receptor
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: myocardial beta - adrenergic receptor