No abstract available
MeSH terms
- 25-Hydroxyvitamin D 2 / blood
- 25-Hydroxyvitamin D 2 / standards
- Clinical Laboratory Techniques / standards
- Humans
- International Cooperation
- Quality Control
- Regression Analysis
- Vitamin D / analogs & derivatives*
- Vitamin D / blood*
- Vitamin D / standards
Substances
- Vitamin D
- 25-Hydroxyvitamin D 2
- 25-hydroxyvitamin D