| http://www.w3.org/ns/prov#value | - ???Dysthymia is linked to a lack of serotonin ??? a brain chemical that governs mood??? Recent studies have found it may be caused by an imbalance of dopamine, another brain chemical. ???We need a certain level of brain chemicals such as dopamine and serotonin to function well, and people that produce too little ??? or, in some cases, too much, thus upsetting this delicate balance ??? may experien
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