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No patient demonstrated a decrease in bone marrow fibrosis as determined by serial procollagen ( PC III ) serum level analysis .
 GENE: procollagen; GENE: PC III
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: procollagen; GENE: PC III