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Peel , a former school teacher , understood that the ergot also had medical applications , such as controlling postpartum bleeding and treating vasoconstriction , hypertension , vascular headache s , and migraine s. Peel gave the ergot business the name Universal Laboratories .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None