Serotonin may undergo a depletion.Logical formLearned from23 sentences. A (serotonin system) may pertain-to a brain.Logical formLearned from22 sentences. A level can be constituted-of-or-filled-with serotonin.Logical formLearned from22 sentences. Serotonin may undergo concentrations.Logical formLearned from21 sentences. Serotonin may undergo a synthesis.Logical formLearned from20 sentences. Serotonin may undergo concentration.Logical formLearned from20 sentences. Male brains may produce serotonin.Logical formLearned from18 sentences. A lack can be constituted-of-or-filled-with serotonin.Logical formLearned from18 sentences. A (neurotransmitter serotonin) may undergo a production.Logical formLearned from17 sentences. A person may have levels of serotonin.Logical formLearned from16 sentences. Stores can be constituted-of-or-filled-with serotonin.Logical formLearned from16 sentences. A male may have stores of serotonin.Logical formLearned from16 sentences. A serotonin can be enough.Logical formLearned from16 sentences. Serotonin may carry roles.Logical formLearned from15 sentences. A serotonin can be discrete.Logical formLearned from15 sentences.