Britain's The Times has collected information on literature with trigger warnings and removed from reading lists due to concerns about their content from 140 universities across the UK.
Two universities, Essex and Sussex, responded that they have removed literature from reading lists to protect students from sensitive content.
Eight universities answered that, for the same purpose, they had changed literature from compulsory reading to voluntary reading.
One of the works removed from the reading list at Sussex University is August Strindberg's play "Miss Julie".
A university spokesperson told The Times it had been permanently banned from an undergraduate course because students complained about its potential psychological and emotional effects as it contains discussions of suicide.
Now the university wants to correct its statement.
"The wording used in our response was incorrect," writes a spokesperson for the university.
Strindberg's play has only been removed temporarily this academic year, due to student suicides at the university.
"We do not permanently remove books from the reading lists, but as at all universities, we regularly review the mandatory reading," writes the spokesperson to Kulturnyheterna.
It is also written that "Miss Julie" will most likely be back on the reading list in 2023.
The Times has found a thousand examples of works carrying a trigger warning on university reading lists at undergraduate level.
Among them are books by authors such as William Shakespeare, Geoffrey Chaucer, Jane Austen, Charlotte Brontë, Charles Dickens and Agatha Christie.