Benefits of high altitude allergen avoidance in atopic adolescents with moderate to severe asthma, over an above treatment with high dose inhaled steroids. - Grootendorst,D.C.; Dahlén,S-E.; van den Bos,J.W.; Duiverman,E.J.; Veselic-Charvat,M.; Vrijlandt,E.JLE.; O'Sullivan,S.; Kumlin,M.; Sterk,P.J.; Roldaan,A.C. (Clinical and Experimental Allergy, 2000)