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Join NHALES and get your asthma under control

Study Description

  • Receive free treatment and medications for your asthma.
  • Participation in the study for each participant will last 5 years.
  • Participants will have approximately 12 study visits over the course of their participation.
  • Visits include physical exams, lung tests, collecting biological samples, and completing surveys.
  • Some participants may be asked to undergo a procedure called bronchoscopy, which looks inside the lungs.
  • Participants that complete all study visits may be compensated up to $3,035, with those completing a bronchoscopy receiving an additional $375.
  • Study visits take place at the National Institute of Environmental Health Sciences Clinical Research Unit in Research Triangle Park, North Carolina.

Study Participants

  • Moderate to severe asthmatics.
  • Men and women, aged 18-60.
  • Women should not be pregnant or breastfeeding at the start of the study, but may still participate if they become pregnant during the study.
  • Nonsmokers that are not exposed to significant amounts of secondhand smoke.
  • No history of chronic obstructive pulmonary disease, emphysema, cystic fibrosis (CF), pulmonary fibrosis, non-CF bronchiectasis, sarcoidosis, unstable angina, or pulmonary hypertension.
  • Not allergic to methacholine.
  • Able to provide your own transportation to clinic visits.
NHALES stands for Natural History of Asthma with Longitudinal Environmental Sampling. Your participation in NHALES will contribute to research on how the environment affects the human body and asthma. Please consider joining today.

For More Information:

Call 919-541-9846
or email

Lead Researcher:

Stavros Garantziotis, M.D.
Stavros Garantziotis, M.D.
Medical Director, NIEHS Clinical Research Unit and Principal Investigator

Tel 919-541-9859
Fax 919-541-9854