I am doing a research paper on Physician isted Suicide.....?

My proffesor wants a very narrow subject, can anyone give me ideas on arguments related to PAS. He wants originality. I was thinking of PAS and the disabled or children but cant pinpoint anything good and narrow... Please help with any topics it is to late for me to change my general topic at this point so I need help with getting that down then i will take a stance from there. Thanks!!!