[1] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Dermatol Allergol, Utrecht, Netherlands
[2] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Psychol, Utrecht, Netherlands
[3] Univ Med Ctr Utrecht, Wilhelmina Childrens Hosp, Dept Pediat Pulmonol Allergol, Utrecht, Netherlands
[4] Dutch Asthma Ctr Davos, Davos, Switzerland