Curr Drug Abuse Rev. 2010 Jun;3(2):76-9. doi: 10.2174/1874473711003020076. Curr Drug Abuse Rev. 2010. PMID: 20712591 Review. . N Engl J Med. 2021 Sep 8:NEJMoa2110362. doi: 10.1056/NEJMoa2110362. Online ahead of print. N Engl J Med. 2021. PMID: 34496194 . Lancet Respir Med. 2021 Aug 31:S2213-2600(21)00331-3. doi: 10.1016/S2213-2600(21)00331-3. Online ahead of print. Lancet Respir Med. 2021. PMID: 34480861 .