Description: Reason why blood was not obtained: No suitable or no palpable vein/collapsed veins - at age 77 years
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| Coding | Meaning |
|---|---|
| 1 | Mentioned |
| Field ID | Description | Category |
|---|---|---|
| 10682 | Reason why blood was not obtained: No suitable or no palpable vein/collapsed veins - at age 77 years | Blood sample |
National Survey of Health and Development 1946 Cohort