Aicken, CR; Armstrong, NT; Cassell, JA; Macdonald, N; Bailey, AC; Johnson, SA; Mercer, CH; (2012) Barriers and opportunities for evidence-based health service planning: the example of developing a Decision Analytic Model to plan services for sexually transmitted infections in the UK. BMC Health Services Research , 12 , Article 202. 10.1186/1472-6963-12-202. Green open access