Association of the Anxiogenic and Alerting Effects of Caffeine with ADORA2A and ADORA1 Polymorphisms and Habitual Level of Caffeine Consumption - Rogers, PJ; Hohoff, C; Heatherley, SV; Mullings, EL; Maxfield, PJ; Evershed, RP; Deckert, J; Nutt, DJ (NEUROPSYCHOPHARMACOLOGY, 2010)