Other similar works Peter Campbell, CSIRO 26 May 2010 Nice paper. It is a proof of concept experiment using Drosophila sibling species to show that MALDI-MS can be used to distinguish small animals, not just the bacteria for which the method was developed originally. The authors were unaware of any similar prior work. In fact I published a similar though less detailed proof of concept experiment with Drosophila in 2005. Another paper using aphids appeared at almost exactly the same time. Systematic Entomology (2005) 30, 186-190. Entomologia Experimentalis et Applicata (2005) 117, 243-247. Just for the record ;) Competing interests None. I'm not working on this any more.