1. The Procter and Gamble Company; Mason Business Center; 8700 Mason Montgomery Road Mason OH 45040 U.S.A.
2. Center for Electron Microscopy and Analysis; The Ohio State University; 1305 Kinnear Road Columbus OH 43212 U.S.A.
3. Proteomics and Mass Spectrometry Laboratory; University of Cincinnati College of Medicine; 3125 Eden Ave. Cincinnati OH 45267 U.S.A.
4. IQAC-CSIC; C/Jordi Girona 18-26 08034 Barcelona Spain