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Sturdy, P., C. Victor, H. Anderson, J. Bland, B. Butland, B. Harrison, C. Peckitt, و J. Taylor. Psychological, Social and Health Behaviour Risk Factors for Deaths Certified As Asthma: A National Case-control Study. BMJ Group, 2002.

Sturdy, P., et al. Psychological, Social and Health Behaviour Risk Factors for Deaths Certified As Asthma: A National Case-control Study. BMJ Group, 2002.