{
  "participant_id": {
    "Description": "Participant identifier"
  },
  "age": {
    "Description": "Age in years (TODO - verify) as in the initial session, might not be correct for other sessions"
  },
  "sex": {
    "Description": "self-rated by participant, M for male/F for female (TODO: verify)"
  },
  "group": {
    "Description": "(TODO: adjust - by default everyone is in control group)"
  }
}