Dunham C, Harms CA Effects of high-intensity interval training on pulmonary function. Eur J Appl Physiol. 2012 Aug;112(8):3061-8. doi: 10.1007/s00421-011-2285-5. Epub 2011 Dec 23.
Gao M, Huang Y, Wang Q, Liu K, Sun G Effects of High-Intensity Interval Training on Pulmonary Function and Exercise Capacity in Individuals with Chronic Obstructive Pulmonary Disease: A Meta-Analysis and Systematic Review. Adv Ther. 2022 Jan;39(1):94-116. doi: 10.1007/s12325-021-01920-6. Epub 2021 Nov 18. Erratum In: Adv Ther. 2022 Jul;39(7):3424.
Kalpaklioglu AF, Kalkan IK Comparison of orally exhaled nitric oxide in allergic versus nonallergic rhinitis. Am J Rhinol Allergy. 2012 Mar-Apr;26(2):e50-4. doi: 10.2500/ajra.2012.26.3717.
Min YG The pathophysiology, diagnosis and treatment of allergic rhinitis. Allergy Asthma Immunol Res. 2010 Apr;2(2):65-76. doi: 10.4168/aair.2010.2.2.65. Epub 2010 Mar 24.
Interventional studies are often prospective and are specifically tailored to evaluate direct impacts of treatment or preventive measures on disease.
Observational studies are often retrospective and are used to assess potential causation in exposure-outcome relationships and therefore influence preventive methods.
Expanded access is a means by which manufacturers make investigational new drugs available, under certain circumstances, to treat a patient(s) with a serious disease or condition who cannot participate in a controlled clinical trial.
Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.
Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.
