CO R R E C T I O N Open Access Correction: optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and in vivo visualization by magnetic resonance imaging Jasmin 1,2* , Ana M Luiza Torres 1 , Henrique MP Nunes 1 , Juliana A Passipieri 1 , Linda A Jelicks 3 , Emerson L Gasparetto 4 , David C Spray 2 , Antonio C Campos de Carvalho 1,2 and Rosalia Mendez-Otero 1 The methods of the published manuscript [1] state that an incorrect concentration of Feridex was used (25 ug/ml). Instead, the methods shou ld state that a co ncentration of 50 ug/ml Feridex was used. Author details 1 Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil. 2 Dept. of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, USA. 3 Dept. of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY, USA. 4 Hospital Universitário Clementino Fraga Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil. Received: 29 March 2011 Accepted: 6 April 2011 Published: 6 April 2011 Reference 1. Jasmin , Torres Luiza M Ana, Nunes MPHenrique, Passipieri AJuliana, Jelicks ALinda, Gasparetto LEmerson, Spray CDavid, de Carvalho C Campos Antonio, Mendez-Otero Rosalia: Optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and in vivo visualization by magnetic resonance imaging. Journal of Nanobiotechnology 2011, 9:4. doi:10.1186/1477-3155-9-12 Cite this article as: Jasmin et al.: Correction: optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and in vivo visualization by magnetic resonance imaging. Journal of Nanobiotechnology 2011 9:12. Submit your next manuscript to BioMed Central and take full advantage of: • Convenient online submission • Thorough peer review • No space constraints or color figure charges • Immediate publication on acceptance • Inclusion in PubMed, CAS, Scopus and Google Scholar • Research which is freely available for redistribution Submit your manuscript at www.biomedcentral.com/submit * Correspondence: jasmin@biof.ufrj.br 1 Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil Full list of author information is available at the end of the article Jasmin et al. Journal of Nanobiotechnology 2011, 9:12 http://www.jnanobiotechnology.com/content/9/1/12 © 2011 Jasmin et al; licensee BioMed Ce ntral Ltd. This is an Open Access article distributed under t he terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestri cted use, distribution, and reproduction in any medium, provided the original work is properly cited. . Access Correction: optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and in vivo visualization by magnetic resonance imaging Jasmin 1,2* , Ana M. Correction: optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and in vivo visualization by magnetic resonance imaging. Journal of Nanobiotechnology 2011. AJuliana, Jelicks ALinda, Gasparetto LEmerson, Spray CDavid, de Carvalho C Campos Antonio, Mendez-Otero Rosalia: Optimized labeling of bone marrow mesenchymal cells with superparamagnetic iron oxide nanoparticles and