1. Schardt C, Adams M, Owens T, Keitz S, Fontelo P: Utilization of the PICO framework to improve searching PubMed for clinical questions. BMC Medical Informatics and Decision Making. 2007, 7 (1): 16-10.1186/1472-6947-7-16.
2. Richardson WS, Wilson MC, Nishikawa J, Hayward RS: The well-built clinical question: a key to evidence-based decisions. ACP J Club. 1995, 123 (3): 12-3.
3. Dawes M, Pluye P, Shea L, Grad R, Greenberg A, Nie JY: The identification of clinically important elements within medical journal abstracts: Patient Population Problem, Exposure Intervention, Comparison, Outcome, Duration and Results (PECODR). Informatics in Primary Care. 2007, 15: 9-16.
4. Demner-Fushman D, Lin J: Answer extraction, semantic clustering, and extractive summarization for clinical question answering. Proceedings of the 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics (COLING/ACL 2006), Sydney, Australia. 2006, 841-848.
5. McKnight L, Srinivasan P: Categorization of sentence types in medical abstracts. Annual Symposium of the American Medical Informatics Association (AMIA), AMIA. 2003, 440-444.