We need broad-based research. The conditions you mentioned are certainly good starting points. In our research with Canadian medical cannabis users, we found that a large proportion are also using cannabisto treat anxiety both on its own and in relation to their illness, and to assist with sleep, in addition to some of those areas that you mentioned.
For anxiety and sleep, many Canadians use prescription medications and over-the-counter medications, and I believe we need studies to compare the side-by-side efficacy of cannabis with those widely used medications, because they have their own set of benefits but also their own set of risks, particularly the common sleeping medications and benzodiazepines. One area of particular importance would be a comparison of cannabis to those sleep and anti-anxiety medications.