Correction to: Comparison of Vitamin B12, Vitamin D, and Folic Acid Blood Levels in Plumbism Patients and Controls in Eastern Iran (Biological Trace Element Research, (2021), 199, 1, (9-17), 10.1007/s12011-020-02119-6)

The original version of this article unfortunately contained mistakes. & The name of “Namam Ali Azadi” is now corrected in the author group & Fourth to seventh sentence of the Abstract section should be “The results indicated that the mean vitamin B12, vitamin D, and folic acid levels for the case group were 517.3 ± 419.4 pg/ml, 25.1 ± 10.8 ng/ml, and 9.2 ± 6.1 ng/ml, respectively. Mean folic acid level in the case group was significantly lower than control group (Fisher exact test, P < 0.001), whereas the mean of the vitamin D levels at the case group was no significantly higher than the control group (Fisher exact test, P = 0.059). Moreover, mean vitamin B12 levels were significantly different between the case and control groups (Fisher exact test, P = 0.009). In the control group, three patients had folic acid below normal level (< 6 ng/mL), while twelve subjects at case group had folic acid below normal level (P < 0.05).Also, none of the control group had low vitamin B12 concentrations (< 180 pg/ml), while seven subjects of case group had vitamin B12 below normal level (P < 0.05).” & In page 6, Discussion part, 4th paragraph: We found that mean blood folate levels in the lead-poisoned patients, who had a mean BLL of 66 ± 37. 3 µg/dl, were significantly lower than in healthy subjects (9.2 ± 6.1 ng/ml vs. 12.70 pg/ml).