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PORTO, PORTUGAL - MARCH 23: Queen Letizia of Spain arrives at 7th European Conference 'Tobacco or Health' in Porto on March 23, 2017 in Porto, Portugal. (Photo by Octavio Passos/Getty Images)

PORTO, PORTUGAL - MARCH 23: Queen Letizia of Spain arrives at 7th European Conference 'Tobacco or Health' in Porto on March 23, 2017 in Porto, Portugal. (Photo by Octavio Passos/Getty Images)