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There is a lack of tools for early detection of pancreatic cancer , one of the deadliest forms of cancer , but CCK2 - R overexpression on pancreatic cancer cells makes CCK based multimers potential markers for these cells .
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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:
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