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  1. Risk Factors for Asthma: Gender, Genetics, Allergies, and More - WebMD

  2. Asthma - Symptoms and causes - Mayo Clinic

  3. Asthma Risk Factors: Sex, Age, Family History, and More

  4. What Causes Asthma? | American Lung Association

  5. Risk factors for asthma - UpToDate

  6. Asthma: Types, Causes, Symptoms, Diagnosis & Treatment

  7. Asthma - World Health Organization (WHO)

  8. What Are Possible Risk Factors for Asthma?

  9. Asthma attack - Symptoms and causes - Mayo Clinic

  10. Asthma: Causes, Symptoms, and Treatment - WebMD

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