| Maarten O Kok Contribution mapping: a method for mapping the contribution of research to enhance its impactMaarten O Kok Department of Health Sciences, V U University, Amsterdam, The Netherlands Health Res Policy Syst 10:21. 2012 Practitioner opinions on health promotion interventions that work: opening the 'black box' of a linear evidence-based approachMaarten O Kok Department of Health Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands Soc Sci Med 74:715-23. 2012 The emergence and current performance of a health research system: lessons from Guinea BissauMaarten O Kok Department of Health Sciences, VU University, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands Health Res Policy Syst 10:5. 2012
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