Every doctor asks different questions so it is hard to speak to the skin questions. It may be something they noticed or just a part of their routine. If part of drug trial, they may be interested or concerned about potential skin side effects (Rash, etc). Research protocols are confidential, so you nor I would be able to access the evaluation questions. If the study is being conducted at a University Medical School, the best you can like do is look up the Med. School's psychiatry department. They often list what clinical trial are in progress and which they are recruiting for.