A 2008 study showed a correlation between the degree of parental rejection of LGB adolescents and negative health problems in the teenagers studied. Crisis centers in larger cities and information sites on the Internet have arisen to help youth and adults. A suicide-prevention helpline for LGBT youth is part of The Trevor Project, established by the filmmakers after the 1998 HBO telecast of the Academy Award-winning short film "Trevor"; Daniel Radcliffe donated a large sum to the group, and has appeared in its public service announcements condemning homophobia.