malawi tobacco Malawi: Premium Burley to the World US Modifies Malawi Tobacco Ban
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20 The smaller a particle, the more likely it will penetrate deeper into the respiratory tract, generating increased potential for adverse health effects
Martin P, Hooker B, Stockton M
The National lung screening trial: results stratified by demographics, smoking history and lung cancer histology
To be an effective research instrument, therefore, the researcher needs training and practice
