Caffeine may potentiate properties of nicotine.Logical formLearned from2 sentences. Scientists may examine effects of exposure to caffeine.Logical formLearned from2 sentences. Cessation of (caffeine consumption) may produce changes velocity.Logical formLearned from2 sentences. A caffeine may produce results.Logical formLearned from2 sentences. Some volunteers may report (caffeine intake).Logical formLearned from2 sentences. Cessation of (caffeine consumption) may produce a (withdrawal syndrome).Logical formLearned from2 sentences. Involvement can be in effects of caffeine.Logical formLearned from2 sentences. (Cola drinks) may be adulterated with caffeine.Logical formLearned from2 sentences. A male may examine concentration of caffeine.Logical formLearned from2 sentences. A group of rats may be exposed to caffeine.Logical formLearned from2 sentences. Caffeine may share properties with psychostimulants.Logical formLearned from2 sentences. Variations can be in responses to caffeine.Logical formLearned from2 sentences. Research may explain effects of caffeine.Logical formLearned from2 sentences. Measurement of (caffeine metabolites) may allow for a measure of (caffeine exposure).Logical formLearned from2 sentences. (Evidence exists) may improve understanding of effects of caffeine.Logical formLearned from2 sentences.