PITTSBURGH — A museum employee has quit in protest of an exhibit coming to the city this fall that features 15 full-body human corpses preserved by a process called plastination.

Elaine Catz, an 11-year employee of the Carnegie Science Center, submitted her resignation last week after raising questions about the ethics behind "Bodies ... The Exhibition." The exhibit is coming to Pittsburgh in October for a seven-month run.

Catz said she was uncomfortable with the exhibit because its organizers, Premier Exhibitions of Atlanta, can't say how the bodies died or why they died.

"Before we put our stamp of approval on it, there should be a high burden of proof on Premier," Catz told a Pittsburgh newspaper.

In the exhibit, the bodies are featured in poses and their skin is removed. It is one of several similar traveling exhibits that millions have seen worldwide.

Officials with Premier said the bodies obtained from a Chinese plastination lab are those of people who were unidentified or unclaimed.