Pearce, N., Aït‐Khaled, N., Beasley, R., Mallol, J., Keil, U., Mitchell, E., & Robertson, C. (2007). Worldwide trends in the prevalence of asthma symptoms: Phase III of the International Study of Asthma and Allergies in Childhood (ISAAC). BMJ Group.

Pearce, Neil, Nadia Aït‐Khaled, Richard Beasley, Javier Mallol, Ulrich Keil, Ed Mitchell, och Colin Robertson. Worldwide Trends in the Prevalence of Asthma Symptoms: Phase III of the International Study of Asthma and Allergies in Childhood (ISAAC). BMJ Group, 2007.

Pearce, Neil, et al. Worldwide Trends in the Prevalence of Asthma Symptoms: Phase III of the International Study of Asthma and Allergies in Childhood (ISAAC). BMJ Group, 2007.