Because past studies found that S and L G carrier had lower function and expression of serotonin transporter [ 18- 20, 60], we divided the 5-HTTLPR polymorphisms into 2 groups, low-functional (S/S S/L G L G /L G ) and high-functional (S/L A L G /L A L A /L A S/XL L A /XL L G /XL), for data analysis.
L and C: data analysis, interpretation and critical revision, and lead on the meta-analysis.
Y-N Sun and L Ni performed data analysis.
Tomasevic L contributed to data analysis and revising of the manuscript.
S, P, T and L performed the data analysis and interpretation.
L: data acquisition, analysis and interpretation, critical revision.
Study design: IH, A-C E, GT, M B-L; data collection: IH; data analysis: IH, A-C E, GT, M B-L; manuscript preparation: IH, A-C E, GT, M B-L.
COI or trnW-L marker and concatenated data (COI and trnW-L) was used for data analysis, with mean substitution/site selected at 1.0 for the time estimation to the units of substitution/site.
L-EO: Study design, data analysis, preparing the manuscript.
JH-L was responsible for data analysis, the initial manuscript draft, correction of the article and submission.
CE-L was responsible for the data analysis and writing process.
