World Health Organization declassified homosexuality as mental disorder on May 17, 1990
Brenda Díaz in prison after participating in anti-government protest
Referendum took place amid continued government persecution
Same-sex couples poised to receive marriage, adoption rights
Havana gathering took place months after anti-government protests
CENESEX made announcement during May 4 press conference
Event was not authorized by Cuban government
More than two dozen people in Cárdenas have received pills
Former president's daughter did not provide specific details
Embargo against the island remains in place
