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Smoking and tobacco use cessation in the elderly:

Siddharth Sarkar ; Nishtha Chawla ; Prabhoo Dayal
http://www.jgmh.org/article.asp?issn=2348-9995;year=2020;volume=7;issue=2;spage=70;epage=77;aulast=Sarkar.  , 2020