David said:
...Autopsy would be in vitro? No, but it is not a living organism either, more like ex vivo.
...Also, there can be ethical issues with studies on humans. Can I write a scholarly article with animal studies?
The problem with animal research is that it does not always translate into valid data for humans. for instance Thalidomide was tested in rats and had no adverse effects but certainly did in humans. Also mouse models of Alzheimers do not accuratelyy reflect the disease in humans. I think animal research can be used to support traditional use, but unless it is dog or pig research (most of what works on these species also works in humans), animal research alone is not evidence of bioequivalence in humans.
...What are the expectations for research citations for the research paper due?
It depends on what the paper is looking at. If it is a science-based look at a topic, then human research would be the most appropriate information. Some areas of research have a lot of human data, other areas none.