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Place
- Washington (D.C.)27
- California--Berkeley16
- United States9
- New York (State)--Rochester8
- Illinois--Peoria7
- Utah--Salt Lake City6
- California--Irvine4
- California--San Jose4
- Kenya--Nairobi3
- Maryland--Annapolis3
- California2
- California--San Francisco2
- New Jersey--Murray Hill2
- New York (State)--Yorktown Heights2
- Senegal--Dakar2
- Beijing da xue. Yi xue bu1
- California--Pacific Grove--Asilomar Conference Grounds1
- Georgia--Atlanta1
- Howard University1
- Illinois--Argonne1