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The term was coined in the early 1900 s by Paul Ehrlich as meaning any use of chemicals to treat any disease ( " chemo - " + " - therapy " ) , such as the use of antibiotics ( " antibacterial chemotherapy " ) .
 Paul Ehrlich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paul Ehrlich