Allergen exposure in infancy and the development of sensitization, wheeze, and asthma at 4 years

Brussee, J.E.; Smit, H.A.; van Strien, R.T.; Corver, K.; Kerkhof, M.; Wijga, A.H.; Aalberse, R.C.; Postma, D.; Gerritsen, J.; Grobbee, D.E.; de Jongste, J.C.; Brunekreef, B.