“PREVALENCE AND SOCIOECONOMIC ASSOCIATIONS OF ASTHMA AND ALLERGIC RHINITIS IN NORTHERN AFRICA”. V. GEORGY, H.I. FAHIM, M. EL GAAFARY AND S. WALTERS. EUR RESPIR J 2006; 28: 756–762.
European Respiratory Journal 2006 28: 1292; DOI: 10.1183/09031936.50089005