Text and Data Mining valid from 2020-02-18
Received: 28 June 2019
Accepted: 6 February 2020
First Online: 18 February 2020
Ethics approval and consent to participate
: The study is a part of The Environment and Childhood Asthma Study in Oslo and has been approved by the Regional Committee for Medical and Health Research Ethics, South East Norway. Both parents gave a written consent to having their child included in the study at the time the mother and child were to leave the hospital after delivery. Thereafter written consent to follow up studies was given at 6 months, one, 2, 10 and by 16 years of age. At the age of 16 the children also gave their written consent to participate in the study.
: Not applicable.
: The authors have no competing interests.