The website is provided by the Warfarin Dose Refinement (DR) Collaboration and IWPC (a group of international collaborations of biostatisticians, geneticists, pharmacists, and physicians who share anonymous data to improve warfarin dosing). is an independent website and is not under the control of our laboratory. The algorithm provided by is continually updated to ensure it provides an accurate and safe warfarin dose estimate. However, our laboratory holds no responsibility for the content and availability of