Anders Bjerg

Mar 30, 2024 | onlinelibrary.wiley.com | Linnea Hedman |Martin Andersson |Anders Bjerg |Helena Backman

1 INTRODUCTION Asthma is one of the most common chronic non-communicable diseases among children and a global health concern. During the second half of the 20th century, an increase in asthma was documented in many areas of the world.1 The International Study of Asthma and Allergies in Childhood (ISAAC) has studied time trends of asthma symptoms in children since the 1990s.