title: Response from Authors.
authors.forename: Nikesh
authors.initials: N
authors.lastname: Patel
authors.forename: Robert M
authors.initials: RM
authors.lastname: Sade
mesh_terms: D002110:Caffeine / Q000494:pharmacology*; D000697:Central Nervous System Stimulants / Q000494:pharmacology*; D003071:Cognition / Q000187:drug effects*; D055030:Drug Users / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D013287:Illicit Drugs / Q000494:pharmacology*; D008297:Male; D018697:Nootropic Agents / Q000494:pharmacology*; D055553:Prescription Drugs / Q000494:pharmacology*
chemical_list: D000697:Central Nervous System Stimulants; D013287:Illicit Drugs; D018697:Nootropic Agents; D055553:Prescription Drugs; D002110:Caffeine