Chen SL, Hoehne FM, Giuliano AE The prognostic significance of micrometastases in breast cancer: a SEER population-based analysis. Ann Surg Oncol. 2007 Dec;14(12):3378-84. Epub 2007 Sep 26.
Moulding FJ, Roach SC, Carrington BM Unusual sites of lymph node metastases and pitfalls in their detection. Clin Radiol. 2004 Jul;59(7):558-72. Review.
Zackrisson S, van de Ven SMWY, Gambhir SS Light in and sound out: emerging translational strategies for photoacoustic imaging. Cancer Res. 2014 Feb 15;74(4):979-1004. doi: 10.1158/0008-5472.CAN-13-2387. Epub 2014 Feb 10. Review.
Zhang E, Laufer J, Beard P Backward-mode multiwavelength photoacoustic scanner using a planar Fabry-Perot polymer film ultrasound sensor for high-resolution three-dimensional imaging of biological tissues. Appl Opt. 2008 Feb 1;47(4):561-77.
Photoacoustic Tomography of Normal and Abnormal Vasculature: Feasibility of in Vivo Measurements.
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.