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Zimorovat, Alireza; Mohammadi-Sartang, Mohsen; Barati-Boldaji, Reza; Raeisi-Dehkordi, Hamidreza
Nutrition journal, 03/2021, Letnik: 20, Številka: 1Journal Article
We read the review by Arabi et al. with great interest which tried to examine the effects of vitamin D supplementation on hemoglobin concentration. It seems that the article suffers from fundamental methodological issues and the conclusions are likely to be erroneous. In this regard, we would like to ask the authors to address the mentioned limitations and to update the analysis in order to provide robust and trustful results. We are concerned that such meta-analyses may lead to the biased findings and conclusions.
