That is one of many bodies of research, it was the easiest one i had at my disposal to send. There are many many more. When used correctly with specifically selected strains it doesnt what so ever cause long term exassibated anxiety which is why i and many others are prescribed it by doctors to treat our anxiety. As i mentioned there are strains which do add to anxiety in those whom suffer it but were not basing this discussion on solely those were basing it in general. In general cannabis doesnt cause prolonged or exasibated anxiety and those who do have anxiety arent choosing to enjoy strains which make it worse so in 99% of cases it doesnt cause any issues with prolonged anxiety or assosiated issues. If it did we wouldnt be prescribed it.