Participants
first-degree, word of mouth
DISORDERS
Twenty-four healthy participants (12 men and 12 women; mean age ± SD: 30 ± 7 years; range: 25–54 years) were recruited by word of mouth or from a pool of volunteers who had contacted our research group because they were interested in participating in a clinical trial on psychedelics. All of the subjects provided written informed consent and were paid for their participation. Exclusion criteria were age <25 years or >65 years, pregnancy (urine pregnancy test at screening and before each test session), personal or family (first-degree relative) history of major psychiatric disorders (assessed by the Semi-structured Clinical Interview for 