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    <span class="person"><a class="citation_browse_link" href="/view/creators/adbbeb38d62f756d51b542a110c159b9.html">Schonmann, Y</a></span>; <span class="person orcid-person"><a href="/view/creators/ead609811de0a0b3997912107b96fd8a.html" class="citation_browse_link">Mansfield, KE</a><a class="orcid" target="_blank" aria-describedby="tooltip-orcid--0000-0002-2551-410X" href="https://orcid.org/0000-0002-2551-410X"><img alt="ORCID logo" src="/images/orcid_id.svg" class="orcid-icon"/></a></span>; <span class="person orcid-person"><a class="citation_browse_link" href="/view/creators/b77507afb7742dd51f5b8bd6bc2dc017.html">Smeeth, L</a><a href="https://orcid.org/0000-0002-9168-6022" aria-describedby="tooltip-orcid--0000-0002-9168-6022" target="_blank" class="orcid"><img alt="ORCID logo" class="orcid-icon" src="/images/orcid_id.svg"/></a></span>; <span class="person orcid-person"><a href="/view/creators/5477a2aff1d3d746d5ba0f887be9640b.html" class="citation_browse_link">Langan, S</a><a class="orcid" target="_blank" aria-describedby="tooltip-orcid--0000-0002-7022-7441" href="https://orcid.org/0000-0002-7022-7441"><img alt="ORCID logo" class="orcid-icon" src="/images/orcid_id.svg"/></a></span> and <span class="person orcid-person"><a class="citation_browse_link" href="/view/creators/a99caf8dfa0ece24d7be9d52aa977f95.html">Nitsch, D</a><a aria-describedby="tooltip-orcid--0000-0001-5767-248X" href="https://orcid.org/0000-0001-5767-248X" class="orcid" target="_blank"><img alt="ORCID logo" src="/images/orcid_id.svg" class="orcid-icon"/></a></span>  
  

(2019).

<a href="https://datacompass.lshtm.ac.uk/cgi/users/home?screen=EPrint::View&amp;eprintid=1222"><xhtml:em xmlns:xhtml="http://www.w3.org/1999/xhtml">Clinical Codelist - Smoking - Read Codes.</xhtml:em></a>

[Dataset].


London School of Hygiene &amp; Tropical Medicine, London, United Kingdom.


    <a href="https://doi.org/10.17037/DATA.00001222" target="_blank">10.17037/DATA.00001222</a>.