I believe that because nicotine is potentially poisonous, and has a narrow therapeutic index, that determining doses uses
algorithms involving height and weight.
This is math, but the concept involves how much drug distributes in the volume of the body tissues:
http://sepia.unil.ch/pharmacology/index.php?id=61
In this study there are probably target concentrations, and those would be standardized as much as possible.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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