i smoked 1 cigarette Smoking: One a Day Can Shorten Life What Happens to Your Body,

Description

Are refresher courses offered

So the pack-years was calculated as CPD/20 *years-smoking

However, it is unclear whether quitting smoking reduces the risk of cataracts

File usage on other wikis The following other wikis use this file: Usage on ar.wikipedia.org Usage on bn.wikipedia.org Usage on br.wiktionary.org Usage on ca.wikipedia.org Usage on cs.wikipedia.org Usage on cs.wikinews.org Usage on de.wikipedia.org Usage on de.wikibooks.org Usage on en.wiktionary.org Usage on es.wikibooks.org Usage on et.wikipedia.org Usage on gl.wikipedia.org Usage on ha.wikipedia.org Usage on he.wikipedia.org Usage on id.wikipedia.org Usage on kk.wikipedia.org Usage on ku.wikipedia.org Usage on pt.wikipedia.org Usage on simple.wikipedia.org Usage on sq.wikipedia.org Usage on vi.wikipedia.org Usage on zgh.wikipedia.org Metadata This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it