The attached picture is what mine looks like
You can have low, medium and high quality
With abstinence from alcohol, brain perfusion abnormalities may recover, but there are several factors that may influence recovery, such as age, diet, exercise, genetic predispositions and the topic of our research other substances such as tobacco products. Cerebral Perfusion in Smokers and Non-Smokers The researchers measured cerebral perfusion in 19 non-smoking alcohol-dependent patients, 22 smoking alcohol-dependent patients, and 28 age-matched, non-smoking, light-drinking controls
It defines "current smokers" as individuals who have smoked at least 100 cigarettes throughout their lifetime and have smoked on at least a few days within the past year
The press conference was held on a Saturday partly out of concern about its effect on the stock market