1. Rector A, Rogers J, Taweel A, Ingram D, Kalra D, Milan J, et al. CLEF—joining up healthcare with clinical and post-genomic research. In: Proceedings of UK e-science all hands meeting 2003, Nottingham, UK; 2003. p. 264–7.
2. Grishman R. Information extraction. In: Mitkov R, editor. The Oxford handbook of computational linguistics; 2003 [Chapter 30].
3. Harkema H, Roberts I, Gaizauskas R, Hepple M. Information extraction from clinical records. In: Cox SJ, Walker DW, editors. Proceedings of the UK e-science all hands meeting 2005, Nottingham, UK; 2005. p. 254–8.
4. Riloff E. Automatically generating extraction patterns from untagged text. In: AAAI/IAAI, vol. 2; 1996. p. 1044–9.
5. Roberts A, Gaizauskas R, Hepple M, Davis N, Demetriou G, Guo Y, et al. The CLEF corpus: semantic annotation of clinical text. In: Proc AMIA Symp. Chicago, IL, USA; 2007. p. 625–9.