BACKGROUND As the number of persons with diabetes is projected to double in the next 25 years in the US, an accurate method of identifying diabetic foot ulcers in population-based data sources are ever more important for disease surveillance and public health purposes. The objectives of this study are to evaluate the accuracy of existing methods and to propose a new method. METHODS Four exist...

Evidence suggests that a large majority of firms and individuals comply with regulations and tax laws even when fines for noncompliance are small or the frequency of inspections and audits is low. These observations are not consistent with static compliance models. Harrington (1988) developed a dynamic enforcement model in which some agents have an incentive to comply even when the cost of comp...

We give a proof of a theorem of Harrington that there is no orbit of the lattice of recursively enumerable sets containing elements of each nonzero recursively enumerable degree. We also establish some degree theoretical extensions.

We prove the direct structural Ramsey theorem for structures with relations as well as functions. The result extends the theorem of Abramson and Harrington and of Nešetřil and Rödl.

Evidence suggests that a large majority of firms and individuals comply with regulations and tax laws even though the frequency of inspections and audits is often low. Moreover, fines for noncompliance are also typically low when regulatory violations are discovered. These observations are not consistent with static compliance models. Harrington (1988) modified these static models by specifying...

A 12-year-old healthy girl underwent a 13-level posterior spinal fusion with Harrington rod, Luque instrumentation and Drummond spinous process wires for scoliosis repair. Her anaesthetic induction and initial intraoperative course were completely uneventful until a precipitous blood pressure drop occurred accompanied by a significant decrease in heart rate. The Harrington rod was being manipul...