RE: “DOES THE SIBLING EFFECT HAVE ITS ORIGIN IN UTERO? INVESTIGATING BIRTH ORDER, CORD BLOOD IMMUNOGLOBULIN E CONCENTRATION, AND ALLERGIC SENSITIZATION AT AGE 4 YEARS”

¹Department of Epidemiology, College of Human Medicine, Michigan State University, East Lansing, MI 48823.

²The David Hide Asthma and Allergy Research Centre, St. Mary’s Hospital, Newport, Isle of Wight, PO30 STG, United Kingdom.

³University Children’s Hospital, Mathildenstrasse 1, D-79106 Freiburg, Germany.