Firstly, this is because, giving up lots of things at once is likely to make the whole process more stressful
The idea that there might be some therapy we could give to innocent bystanders to help protect them from the consequences of being raised in a home with a smoker is quite gratifying. Bikman and his team exposed mice to secondhand smoke and watched how their little bodies reacted
Surgeon General, 5.6 million Americans younger than 18 today will die early from smoking-related diseases
Conference on Health, Inference, and Learning
Adelaja, Price Changes, Supply Elasticities, Industry Organization, and Dairy Output Distribution, American Journal of Agricultural Economics 73:1 (February 1991):89102