Bloch C, Richard JL [Risk factors for atherosclerotic diseases in the Prospective Parisian Study I. Comparison with foreign studies]. Rev Epidemiol Sante Publique. 1985;33(2):108-20. Review. French.
Igari K, Kudo T, Toyofuku T, Jibiki M, Inoue Y, Kawano T Quantitative evaluation of the outcomes of revascularization procedures for peripheral arterial disease using indocyanine green angiography. Eur J Vasc Endovasc Surg. 2013 Oct;46(4):460-5. doi: 10.1016/j.ejvs.2013.07.016.
Kang Y, Lee J, Kwon K, Choi C Application of novel dynamic optical imaging for evaluation of peripheral tissue perfusion. Int J Cardiol. 2010 Dec 3;145(3):e99-101. doi: 10.1016/j.ijcard.2008.12.166.
Kang Y, Lee J, Kwon K, Choi C Dynamic fluorescence imaging of indocyanine green for reliable and sensitive diagnosis of peripheral vascular insufficiency. Microvasc Res. 2010 Dec;80(3):552-5. doi: 10.1016/j.mvr.2010.07.004.
Kannel WB, McGee DL Update on some epidemiologic features of intermittent claudication: the Framingham Study. J Am Geriatr Soc. 1985 Jan;33(1):13-8.
Levesque E, Hoti E, Azoulay D, Adam R, Samuel D, Castaing D, Saliba F Non-invasive ICG-clearance: a useful tool for the management of hepatic artery thrombosis following liver transplantation. Clin Transplant. 2011 Mar-Apr;25(2):297-301. doi: 10.1111/j.1399-0012.2010.01252.x.
Norgren L, Hiatt WR, Dormandy JA, Nehler MR, Harris KA, Fowkes FG; TASC II Working Group , Bell K, Caporusso J, Durand-Zaleski I, Komori K, Lammer J, Liapis C, Novo S, Razavi M, Robbs J, Schaper N, Shigematsu H, Sapoval M, White C, White J, Clement D, Creager M, Jaff M, Mohler E 3rd, Rutherford RB, Sheehan P, Sillesen H, Rosenfield K. Inter-Society Consensus for the Management of Peripheral Arterial Disease (TASC II). Eur J Vasc Endovasc Surg. 2007;33 Suppl 1:S1-75.
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.