@article{Bernsen2003,
author = {Bernsen, R.M.D. and de Jongste, J.C. and van der Wouden, J.C.},
title= {Birth order and sibship size as independent risk factors for asthma, allergy, and eczema},
year = {2003},
doi = {10.1046/j.0905-6157.2003.00108.x},
journal = {Pediatric Allergy and Immunology},
volume = {14},
number = {6},
pages = {464−469},
}