Acknowledgements
The authors thank the ‘‘Federació Catalana de Grups de Suport a
la Lactància” (breastfeeding supporting group) and Inma Marcos
for recruiting human milk donors, Núria Borraz Pradales for her
technical assistance, and Toni Monleón Getino for his statistical advice.
This work was financially supported by a predoctoral fellowship
to Carolina Moltó-Puigmartí and by the research project
AGI2005-069401/ALI from the Spanish Ministry of Education and
Science.