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	1.	[Current viewpoints concerning antibiotic treatment in COPD-patients]. [electronic resource] by van Duijn, N P Producer: 19941110 In: Nederlands tijdschrift voor geneeskunde vol. 138 Availability: No items available. Save to lists Add to cart (remove)
	2.	[Chronic maxillary sinusitis and the potential role of the allergic reaction of the nasal mucosa]. [electronic resource] by van Duijn, N P Producer: 19880726 In: Nederlands tijdschrift voor geneeskunde vol. 132 Availability: No items available. Save to lists Add to cart (remove)
	3.	[Mammography, a study sometimes liable to error]. [electronic resource] by van Duijn, N P Producer: 19870316 In: Nederlands tijdschrift voor geneeskunde vol. 130 Availability: No items available. Save to lists Add to cart (remove)
	4.	Does this patient have sinusitis? [electronic resource] by van Duijn, N P Producer: 19940309 In: JAMA vol. 271 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	5.	[Physical examination--rebound tenderness]. [electronic resource] by van Weert, H C van Duijn, N P Producer: 19990702 In: Nederlands tijdschrift voor geneeskunde vol. 143 Availability: No items available. Save to lists Add to cart (remove)
	6.	Use of symptoms and signs to diagnose maxillary sinusitis in general practice: comparison with ultrasonography. [electronic resource] by van Duijn, N P Brouwer, H J Lamberts, H Producer: 19921123 In: BMJ (Clinical research ed.) vol. 305 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	7.	Menstrual migraine in a representative Dutch population sample: prevalence, disability and treatment. [electronic resource] by Couturier, E G M Bomhof, M A M Neven, A Knuistingh van Duijn, N P Producer: 20030617 In: Cephalalgia : an international journal of headache vol. 23 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	8.	Identifying relevant diagnostic studies in MEDLINE. The diagnostic value of the erythrocyte sedimentation rate (ESR) and dipstick as an example. [electronic resource] by van der Weijden, T IJzermans, C J Dinant, G J van Duijn, N P de Vet, R Buntinx, F Producer: 19970819 In: Family practice vol. 14 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	9.	Establishing principles for migraine management in primary care. [electronic resource] by Dowson, A J Sender, J Lipscombe, S Cady, R K Tepper, S J Smith, R Smith, T R Taylor, F R Boudreau, G P van Duijn, N P Poole, A C Baos, V Wöber, C Producer: 20031001 In: International journal of clinical practice vol. 57 Availability: No items available. Save to lists Add to cart (remove)