1. Wishart DS, Tzur D, Knox C, Eisner R, Guo AC, Young N, Cheng D, Jewell K, Arndt D, Sawhney S, Fung C, Nikolai L, Lewis M, Coutouly M, Forsythe I, Tang P, Shrivastava S, Jeroncic K, Stothard P, Amegbey G, Block D, Hau DD, Wagner J, Miniaci J, Clements M, Gebremedhin M, Guo N, Zhang Y, Duggan E, MacInnis GD, Weljie AM, Dowlatabadi R, Bamforth F, Clive D, Greiner R, Li L, Marrie T, Sykes BD, Vogel HJ, Querengesser L (2007) HMDB: the human Metabolome database. Nucleic Acids Res 35:D521–D526
2. Dunn WB, Bailey NJC, Johnson HE (2005) Measuring the metabolome: current analytical technologies. Analyst 30:606–625
3. Olivier I, Loots DT (2012) A comparison of two extraction methods for differentiating and characterising various Mycobacterium species and Pseudomonas aeruginosa using GC-MS metabolomics. Afr J Microbiol Res 6:3159–3172
4. Du Preez I, Loots DT (2013) Detection limit for differentiating between various Mycobacterium species and Pseudomonas aeruginosa using gas chromatography-mass spectrometry (GC-MS) metabolomics: a comparison of two extraction methods. Afr J Microbiol Res 7:797–801
5. Loots DT, Meissner-Roloff RJ, Newton-Foot M, van Pittius G, Nicolaas C (2013) A metabolomics approach exploring the function of the ESX-3 type VII secretion system of M. smegmatis. Metabolomics 9:631–641