Erratum to: The effect of aging on the frequency, phenotype and cytokine production of human blood CD4 + CXCR5 + T follicular helper cells: comparison of aged and young subjects.

[This corrects the article DOI: 10.1186/1742-4933-11-12.].

Erratum

After publication of this work [1], we noted that this article’s first address should have been stated as Guangzhou Medical University. We have changed it accordingly without changing the authors’ order.