I want to know the answer to the following question:
How many classes of research does Woolf encourage?
All the background I'm provided with is that "Woolf suggests three classes of pain : (1) nociceptive pain, (2) inflammatory pain which is associated with tissue damage and the infiltration of immune cells, and (3) pathological pain which is a disease state caused by damage to the nervous system or by its abnormal function (e.g. fibromyalgia, irritable bowel syndrome, tension type headache, etc.).". Is that enough to answer the question?
Answer: yes