Assad AP, da Silva TF, Bonfa E, Pereira RM Maternal and Neonatal Outcomes in 89 Patients with Takayasu Arteritis (TA): Comparison Before and After the TA Diagnosis. J Rheumatol. 2015 Oct;42(10):1861-4. doi: 10.3899/jrheum.150030. Epub 2015 Sep 1.
Jiang L, Li D, Yan F, Dai X, Li Y, Ma L Evaluation of Takayasu arteritis activity by delayed contrast-enhanced magnetic resonance imaging. Int J Cardiol. 2012 Mar 8;155(2):262-7. doi: 10.1016/j.ijcard.2010.10.002. Epub 2010 Nov 6.
Kötter I, Henes JC, Wagner AD, Loock J, Gross WL Does glucocorticosteroid-resistant large-vessel vasculitis (giant cell arteritis and Takayasu arteritis) exist and how can remission be achieved? A critical review of the literature. Clin Exp Rheumatol. 2012 Jan-Feb;30(1 Suppl 70):S114-29. Epub 2012 May 11. Review.
Wen D, Du X, Ma CS Takayasu arteritis: diagnosis, treatment and prognosis. Int Rev Immunol. 2012 Dec;31(6):462-73. doi: 10.3109/08830185.2012.740105. Review.
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.
