As he explains, We use smell in one of two ways orthonasal olfaction, smelling stuff from the outside when air comes through the front of the nose, and retronasal olfaction, when the air travels backwards through the nose and we essentially breath out the smell of the food we are eating. Either way, odour particles reach the olfactory epithelium, at the top of the nose, where the specialised receptor cells live. The nerves travel from the receptors upwards through a bone called the cribriform plate and into the olfactory bulb at the bottom of the brain
Most users report that their starter kit pays for itself within the first week of use through the dramatic per-use cost reduction compared to traditional cigarettes
You can also follow the campaign on Twitter and track them on Facebook.Thumbnail image posted to Flickr by user Javier Ignacio Acua Ditzel, used under Creative Commons license.
The dataset used was the i2b2 dataset of medical summary of discharge, which was used to determine smoking status
It is also important to recognize that smokers tend to be minorities of lower socioeconomic status
