9731
Such a probe should be useful in imaging cells , tissues and tumors that are GRPR and / or Y1 positive and should target radioisotopes , for example , ( 68 ) Ga and / or ( 177 ) Lu , to more tumors cells than single GRPR or Y1 targeted probes .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None