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Fourteen weeks after the start of phosphate supplementation , half of the Nx and Sham dogs received doses of OCT ( three times per week ) ; the other half were given vehicle for 60 weeks .
 Chemical: phosphate; Chemical: OCT
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: phosphate; Chemical: OCT