99
Technetium - 99m stannous pyrophosphate myocardial scintigrams were obtained in 138 clinically stable patients 32 . 7 + / - 47 . 3 weeks ( range 6 to 260 ) after acute myocardial infarction .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None