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![The serotonin transporter gene-linked polymorphic region (5-HTTLPR) and the sleep-promoting effects of tryptophan: A randomized placebo-controlled crossover study](https://scholarlypublications.universiteitleiden.nl/sites/all/themes/scholarly/img/closed_access.png)
The serotonin transporter gene-linked polymorphic region (5-HTTLPR) and the sleep-promoting effects of tryptophan: A randomized placebo-controlled crossover study
- All authors
- Dalfsen, J.H. van; Markus, C.R.
- Date
- 2019-08-31
- Journal
- Journal of Psychopharmacology
- Volume
- 33
- Issue
- 8
- Pages
- 948 - 954