Here comes probably one of the first papers that say NO to a gene for depression. As expected it is a meta-analysis:
Contrary to a previous report, an analysis of 14 previous studies does not find an association between a serotonin transporter gene variation, stressful life events, and an increased risk of major depression … “A more serious concern … is that the findings of this [Caspi et al] and other nonreplicated genetic associations are now being translated to a range of clinical, legal, research, and social settings such as forensics, diagnostic testing, study participants, and the general public. It is critical that health practitioners and scientists in other disciplines recognize the importance of replication of such findings.”
no stool test;-) nothing!