526
However , at the time of salvage treatment , the mean serum PSA levels were 9 . 1 and 1 . 1 ng / mL for the salvage RP and salvage RT groups , respectively ( P = 0 . 0001 ) .
 GENE: serum PSA
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: serum PSA