| Analytical quality goals for 25-vitamin D based on biological variation, Viljoen A, Singh DK, Farrington K and Twomey PJ, 2011, J Clin Lab Anal, 25, 130-3 | 12.1 | 40.3 | Mixed | Healthy (excl pregnant) | Serum |
| Short-term variability of vitamin D-related biomarkers, Lutsey P, Parrinello CM, Misialek JR et al, 2016, Clin Chem, 12, 1647-53 | 6.9 | 31.4 | Mixed | Non-healthy (excl pregnant) | Serum |
| Biological variation of laboratory analytes based on the 1999–2002 National Health and Nutrition Examination Survey, Lacher DA, Hughes JP and Carroll MD, 2010, National Health Statistics Reports , 21, | 11.6 | | Mixed | Healthy (excl pregnant) | Serum |
| Biological variation of laboratory analytes based on the 1999–2002 National Health and Nutrition Examination Survey, Lacher DA, Hughes JP and Carroll MD, 2010, National Health Statistics Reports , 21, | 11.6 | | Mixed | Healthy (excl pregnant) | Serum |
| Biological variation of laboratory analytes based on the 1999–2002 National Health and Nutrition Examination Survey, Lacher DA, Hughes JP and Carroll MD, 2010, National Health Statistics Reports , 21, | 21.2 | | Mixed | Healthy (excl pregnant) | Serum |
