5087
Under specific conditions VDH potentiates P4 ' s neuroprotective efficacy and should be considered as a potential partner of P4 in a low - cost , safe and effective combinatorial treatment for stroke .
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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