Project title
The research was funded by Fundac¸a˜o para a Cieˆncia e a Tecnologia under the projects PEst-C/SAU/LA0001/2011 and PTDC/BIA-MIC/105247/2008. SC and JC acknowledge scholarships from FCT (SFRH/BD/46212/2008 and SFRH/BPD/34007/2006). The National NMR Network (REDE/1517/RMN/2005) was supported by POCI 2010 and Fundac¸a˜o para a Cieˆncia e a Tecnologia