Changes can be in (brain serotonin concentrations).Logical formLearned from2 sentences. A (serotonin deficiency condition) can be chronic.Logical formLearned from2 sentences. Rats may have (serotonin levels).Logical formLearned from2 sentences. A reduction can be in (serotonin concentrations).Logical formLearned from2 sentences. Damage can be to (brain serotonin cells).Logical formLearned from2 sentences. A (serotonin reuptake enhancer) can be putative.Logical formLearned from2 sentences. Copies may pertain-to a (serotonin transporter gene).Logical formLearned from2 sentences. Individuals can be with a (serotonin genotype).Logical formLearned from2 sentences. Serotonin may be accelerated.Logical formLearned from2 sentences. Locusts may triple an amount of serotonin.Logical formLearned from2 sentences. Serotonin may cause a change.Logical formLearned from2 sentences. Drugs may block serotonin.Logical formLearned from2 sentences. Locusts may produce serotonin.Logical formLearned from2 sentences. Levels of serotonin may be implicated in depression.Logical formLearned from2 sentences. Changes can be in a (serotonin transporter).Logical formLearned from2 sentences.