Erratum: Human CD4+CD25hiFoxp3+ regulatory T cells are derived by rapid turnover of memory populations in vivo (Journal of Clinical Investigation (2006) 116 (2423-2433) DOI:10.1172/JCI28941) - Vukmanovic-Stejic, M; Zhang, Y; Cook, J; Fletcher, J; McQuaid, A; Masters, J; Rustin, M; Taams, L; Beverley, P; Macallan, D; Akbar, A (2006)