Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Psilocybin for treatment-resistant depression: fMRI-measured brain mechanisms [pdf]. Parent comment
In epidemiological surveys, lifetime use == reports using at least once.
Not necessarily. For smoking you need to smoke 100 cigarettes before qualifying for lifetime use.
In epidemiological surveys, lifetime use == reports using at least once.