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After World War II , he returned to St. Bartholomew ’s Hospital with Sir James Paterson Ross and Mr. J.E.A. O’Connell .
 St. Bartholomew ’s Hospital
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 St. Bartholomew ’s Hospital