Ellebaek SB, Fristrup CW, Mortensen MB Intraoperative Ultrasound as a Screening Modality for the Detection of Liver Metastases during Resection of Primary Colorectal Cancer - A Systematic Review. Ultrasound Int Open. 2017 Apr;3(2):E60-E68. doi: 10.1055/s-0043-100503. Epub 2017 Jun 7.
Foxtrot Collaborative Group Feasibility of preoperative chemotherapy for locally advanced, operable colon cancer: the pilot phase of a randomised controlled trial. Lancet Oncol. 2012 Nov;13(11):1152-60. doi: 10.1016/S1470-2045(12)70348-0. Epub 2012 Sep 25.
Hajian-Tilaki K Sample size estimation in diagnostic test studies of biomedical informatics. J Biomed Inform. 2014 Apr;48:193-204. doi: 10.1016/j.jbi.2014.02.013. Epub 2014 Feb 26.
Heald RJ, Husband EM, Ryall RD The mesorectum in rectal cancer surgery--the clue to pelvic recurrence? Br J Surg. 1982 Oct;69(10):613-6. doi: 10.1002/bjs.1800691019.
Jhaveri KS, Hosseini-Nik H MRI of Rectal Cancer: An Overview and Update on Recent Advances. AJR Am J Roentgenol. 2015 Jul;205(1):W42-55. doi: 10.2214/AJR.14.14201.
West NP, Hohenberger W, Weber K, Perrakis A, Finan PJ, Quirke P Complete mesocolic excision with central vascular ligation produces an oncologically superior specimen compared with standard surgery for carcinoma of the colon. J Clin Oncol. 2010 Jan 10;28(2):272-8. doi: 10.1200/JCO.2009.24.1448. Epub 2009 Nov 30.
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.
