Background and Purpose Despite its low efficacy, aspirin is the most widely used drug for secondary stroke prevention. The reasons why stroke recurs while patients are on aspirin are unknown. We have analyzed a series of patients who had recurrent strokes while on aspirin. Methods Out of 2231 consecutive patients who were admitted to the Tel Aviv Medical Center from May 1988 through December 19...

Twenty-eight active international athletes agreed to be available for random spot urine collections at their homes, places of work and training. Suitable briefed collectors were arranged to conduct the spot collections and forward the specimens for analysis. An average number of 3.4 collections per athlete was made in the 9 month period of the trial. Overall there was a "failure to collect" per...

A kit is a specific collection of components and/or tools needed for completing a procedure or producing a product. A multiperiod material planning system for production kits under the demand and procurement lead-time uncertainty is considered when component sharing among kits is plausible. Simulation experiments show that component sharing improves the system’s service measure of average kit a...