From 2003 until 2013 de Roos chaired the Dutch Dermatology Society Working Party on Venous Disease. In 2011 he co-founded the Dutch College of Phlebology and currently serves as co-chair of the Dutch guideline on varicose veins and venous disease. References 1. Roos K-P de, Neumann HAM. Traumatic neuroma; a rare complication following Muller’s phlebectomy. J Dermatol Surg and Oncol 1994; 20: 681-2. 2. Roos K-P de, Neumann HAM. Muller’s ambulatory phlebectomy and varicose veins of the foot. Dermatol Surg 1998; 24: 465-70. 3. Roos K-P de, Nieman FHM, Neumann HAM. Patient satisfaction after ambulatory phlebectomy for varicose veins of the foot. Dermatol Surg 2002; 28: 1027-30. 4. Roos K-P de, Nieman FHM, Neumann HAM. Ambulatory phlebectomy versus compression sclerotherapy; results of a randomized controlled trial. Dermatol Surg 2003; 29: 211-6. 5. Kockaert MA, Roos K-P de, Dijk L van. Duplication of the Greater Saphenous Vein: A definition problem and implications for therapy. Dermatol Surg 2012: 38; 77-82. 6. Reeder SWI, Roos K-P de, Maeseneer, MGR de. Ulcer recurrence after in-hospital treatment for recalcitrant venous leg ulceration. Br J Dermatol 2013: 168: 999-1002. 7. Roos K-P de, Groen L, Leenders ACAP. Foam sclerotherapy; investigating the need for sterile air. Dermatol Surg. 2011: 37; 1119-24. 8. Reeder SWI, Roos K-P de, Vogels RJM, et al. E-survey on venous leg ulcer among Dutch dermatologists. Phlebologie, 2013; 42: 270-4. 9. Roos K-P de. Clinical aspects and indications for endovenous treatments for varicose veins. Lasers Med Sci 2014; 29: 377-82. 167 Side branch varicosis on left upper leg. Result of ambulatory phlebectomy after 6 weeks. BWEADVSMGFINCORR:Opmaak 1 21-07-2014 17:41 Pagina 167