We included 28 right-handed (assessed with the Edinburgh Handedness Inventory) (NAME_1 1971) healthy volunteers in this study. Participants were 14 men and 14 women, aged 30–50 years (mean ± standard deviation (SD) = 38.57 ± 5.27 years). The mean IQ (± SD) was 115.93 ± 13.53 measured with the Mehrfachwahl-Wortschatz-Intelligenztest (Lehrl 2005). Left-handed subjects, as well as participants with current general medical conditions, neurological disorders or history of psychiatric axis I or II (assessed with SCID I and II screening) (First et al. 1996, 1997) or axis I disorder in a first-degree relative according to DSM IV were excluded from this study. The study was undertaken in compliance with the Declaration of Helsinki and was approved by the local ethics committee of the Charite ́—Universita ̈tsmedizin Berlin. All subjects gave written informed consent to participate in the experiment.

Please extract information about the subject from the text and output it in the following format, if unspecified in the text, please use "NA" insteal:
output example:
{
    "sample_size": "",
    "female": "",
    "mean_age": "",
    "age_span": "",
    "education": "",
    "race": "",
    "area": "",
    "socioeconomic": "",
    "remuneration": "",
    "handedness": ""
} There should be exactly 7 paragraphs separated by the markdown divider: ***.
user