1. Perinatal risk factors for bronchial hyperresponsiveness and atopy after a follow-up of 20 years 
Judith M Vonk, MSc, H.Marike Boezen, PhD, Dirkje S Postma, PhD, Jan P Schouten, MSc, Wim M.C van Aalderen, PhD, E.Rudy Boersma, PhD 
Journal of Allergy and Clinical Immunology 
Volume 114, Issue 2, Pages (August 2004)
DOI: /j.jaci

2. Fig 1
Prevalences of perinatal and other risk factors for the development of BHR or atopy. Subjects are classified into 4 groups: no BHR/no atopy, n=229; no BHR/atopy, n=163; BHR/no atopy, n=50; BHR/atopy, n=77. #P < .10, ∗P < .05.
Journal of Allergy and Clinical Immunology  , DOI: ( /j.jaci )