title: Blood relatives of follicular helper T cells.
abstract: Expression of the chemokine receptor CXCR5 identifies B follicular helper T cells. In this issue of Immunity, Morita et al. (2011) describe a heterogeneous circulating CXCR5(+)CD4(+) B cell helper population overrepresented in juvenile dermatomyositis patients.
authors.affiliation: John Curtin School of Medical Research, Australian National University, Canberra, ACT 0200, Australia. carola.vinuesa@anu.edu.au
authors.forename: Carola G
authors.initials: CG
authors.lastname: Vinuesa
authors.forename: Matthew C
authors.initials: MC
authors.lastname: Cook