**Acknowledgements**

The authors would like to gratefully acknowledge the valuable support by Dr. José Manuel Correia Costa, from Laboratório de Parasitologia, Instituto Nacional de Saúde Dr. Ricardo Jorge (INSRJ), Porto, Portugal; and Biosckin, Molecular and Cell Therapies SA support for the umbilical cord units supply used in the experimental work and for the access of the au‐ thors to the GMP classified cell culture room and all the equipment used in cell culture and flow citometry analysis (Scientific Protocol between Porto University and Biosckin, Molecu‐ lar and Cell Therapies SA). This work was supported by Fundação para a Ciência e Tecnolo‐ gia (FCT), Ministério da Ciência e Ensino Superior (MCES), Portugal, through the financed research project PTDC/DES/104036/2008, and by QREN N° 1372 para Criação de um Núcleo I&DT para Desenvolvimento de Produtos nas Áreas de Medicina Regenerativa e de Tera‐ pias Celulares – Núcleo Biomat & Cell. A Gärtner has a Doctoral Grant from Fundação para a Ciência e Tecnologia (FCT), Ministério da Ciência e Ensino Superior (MCES), Portugal, SFRH/BD/70211/2010.
