Mariela Castro, daughter of Cuban President Raul Castro, smiles before speaking to an academic conference at San Francisco General Hospital in San Francisco, Wednesday, May 23, 2012. Castro, an outspoken gay rights advocate, spoke at a medical lecture for health care providers on care for transgender patients. (AP Photo/Eric Risberg)

Associated Press
Mariela Castro, daughter of Cuban President Raul Castro, smiles before speaking to an academic conference at San Francisco General Hospital in San Francisco, Wednesday, May 23, 2012. Castro, an outspoken gay rights advocate, spoke at a medical lecture for health care providers on care for transgender patients. (AP Photo/Eric Risberg)
Mariela Castro, daughter of Cuban President Raul Castro, smiles before speaking to an academic conference at San Francisco General Hospital in San Francisco, Wednesday, May 23, 2012. Castro, an outspoken gay rights advocate, spoke at a medical lecture for health care providers on care for transgender patients. (AP Photo/Eric Risberg)
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