What should I do, as my submitted paper is still under review after 1 year?
I'm in a different field, but had a similar situation. I got a paper published in a journal in a matter of 6 months (submission to publication), then followed with another paper a month later. That paper was in review without notice for 6 months. After two unanswered emails, I politely asked for a decision on publication such that I might submit elsewhere if publication wasn't likely. This prompted them to respond that they were having trouble locating reviewers and asked for a list of potential reviewers. I received my reviews for the paper about 2 months later. It seems that if you suggest you might pull the paper and submit elsewhere, it may open a more honest conversation!