26158
In all but one city ( Turin ) , a drop in the prevalence of PDB was recorded ( pooled OR 0 . 64 : 95 % CI : 0 . 45 - 0 . 91 ) .
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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