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	1.	Patients with erythropoietic protoporphyria have reduced erythrocyte protoporphyrin IX from early in pregnancy. [electronic resource] by Heerfordt, I M Wulf, H C Producer: 20180813 In: The British journal of dermatology vol. 177 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Image Gallery: Pitfalls when measuring protoporphyrin IX during photodynamic therapy. [electronic resource] by Heerfordt, I M Wulf, H C Producer: 20190124 In: The British journal of dermatology vol. 177 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Daylight photodynamic therapy of actinic keratosis without curettage is as effective as with curettage: a randomized clinical trial. [electronic resource] by Heerfordt, I M Wulf, H C Producer: 20200416 In: Journal of the European Academy of Dermatology and Venereology : JEADV vol. 33 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	4.	Protoporphyrin IX in the skin measured noninvasively predicts photosensitivity in patients with erythropoietic protoporphyria. [electronic resource] by Heerfordt, I M Wulf, H C Producer: 20170918 In: The British journal of dermatology vol. 175 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	5.	Sun behaviour on the beach monitored by webcam photos. [electronic resource] by Heerfordt, I M Philipsen, P A Wulf, H C Producer: 20180404 In: Public health vol. 155 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	6.	Increased protoporphyrin IX accumulation does not improve the effect of photodynamic therapy for actinic keratosis: a randomized controlled trial. [electronic resource] by Nissen, C V Heerfordt, I M Wiegell, S R Mikkelsen, C S Wulf, H C Producer: 20180326 In: The British journal of dermatology vol. 176 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)