AUTHOR=Esteve Vicent , Martínez-Granados Beatriz , Martínez-Bisbal M. Carmen TITLE=Pitfalls to be considered on the metabolomic analysis of biological samples by HR-MAS JOURNAL=Frontiers in Chemistry VOLUME=2 YEAR=2014 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2014.00033 DOI=10.3389/fchem.2014.00033 ISSN=2296-2646