21525
Thus , PTHrP is a potent endogenous relaxant of bladder contraction , and autocrine or paracrine mechanism of PTHrP - PTH1R axis is a physiologically relevant pathway functioning in the bladder .
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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