6662
Do overall treatment time , field size , and treatment energy influence local control of T1 - T2 squamous cell carcinomas of the glottic larynx ? PURPOSE : To evaluate treatment and patient related prognostic factors that may influence local control in the treatment of T1 - T2 squamous cell carcinoma of the glottic larynx .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None