5937
Heart rate ( HR ) and electrocardiogram ( ECG ) was monitored at approximately 24 - h both after the 3rd exposure and the last ( 6th ) exposure , and systolic blood pressure ( SBP ) was monitored at approximately 24 - h after the 6th exposure .
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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