Harder H, Nielsen L, Tu DT, Astrup A The effect of liraglutide, a long-acting glucagon-like peptide 1 derivative, on glycemic control, body composition, and 24-h energy expenditure in patients with type 2 diabetes. Diabetes Care. 2004 Aug;27(8):1915-21. doi: 10.2337/diacare.27.8.1915.
Robinson L, Ojha S, Symonds ME, Budge H Body mass index as a determinant of brown adipose tissue function in healthy children. J Pediatr. 2014 Feb;164(2):318-22.e1. doi: 10.1016/j.jpeds.2013.10.005. Epub 2013 Nov 14.
Symonds ME, Henderson K, Elvidge L, Bosman C, Sharkey D, Perkins AC, Budge H Thermal imaging to assess age-related changes of skin temperature within the supraclavicular region co-locating with brown adipose tissue in healthy children. J Pediatr. 2012 Nov;161(5):892-8. doi: 10.1016/j.jpeds.2012.04.056. Epub 2012 Jun 5.
Thackeray JT, Beanlands RS, Dasilva JN Presence of specific 11C-meta-Hydroxyephedrine retention in heart, lung, pancreas, and brown adipose tissue. J Nucl Med. 2007 Oct;48(10):1733-40. doi: 10.2967/jnumed.107.043570. Epub 2007 Sep 14.
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.
