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Prior to assuming the position at Zurich , Dr. Amsler was chief ophthalmologist in Lausanne , since 1935 .
 Zurich, Amsler, Lausanne
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Zurich, Amsler, Lausanne