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@AledHopkins Can't access the full text - possibly: https://t.co/WFiWL7G74f
@AledHopkins Can't access the full text - possibly: https://t.co/WFiWL7G74f
Effects of caffeine and caffeine w... [Psychopharmacology (Berl). 2005] - PubMed - NCBI http://t.co/Zs7gysXiQZ
@invertenerd It's because of caffeine withdrawal. :) http://t.co/wiKp91ZtYw