tobacco smoke exposure Limiting to Secondhand No Level of Smoke Exposure

This estimate will vary depending on the software

However, modern radiotherapy techniques are able to reduce the radiation dose to the surrounding healthy tissues, such as the heart and lungs, while better targeting the cancer itself

[PubMed: 8992230] Benetazzo MG, Gil LS, Bombieri C, Malerba G, Massobrio M, Pignatti PF, Luisetti M

Age restrictions for selling tobacco are often not enforced, undermining efforts like this to reduce smoking by increasing the legal age, and it is difficult to standardize regulations because smoking laws vary from state to state, and even from county to county

[199] Human Rights Watch interview with Eli B., 15, Greene County, North Carolina, May 18, 2013

containing a broad set of federal requirements designed to significantly curb access to and the appeal of cigarettes and smokeless tobacco products to children and adolescents in the United States