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demographic characteristics of experts participants
| Code | Gender | Educational level | Expert field | Occupation type | Experience (year) | Interview location |
|---|---|---|---|---|---|---|
| 18 | Male | PhD | Gerontology | Educational and practical | 10 | Office |
| 19 | Male | PhD | Gerontology | Educational and practical | 12 | Office |
| 20 | Female | PhD | Social science | Educational | 11 | Office |
| 21 | Female | PhD | Social science | Educational | 8 | Office |
| 22 | Male | Bachelor’s degree | Retirement | Practical | 20 | Telephone |
