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how was tobacco used in the past Trade Tobacco - The National Archives
Description
Regressions were corrected for sex, age of diagnosis, anatomical subsite, region and alcohol or tobacco consumption

Dentists can apply these treatments safely while protecting your gums, often producing noticeably whiter teeth in a single visit

References 1.Peto R, Chen ZM, Boreham J

PMID: 19675554 Treb RM
