BACKGROUND Studies examining the association between telomere length and cancer risk have often relied on measurement of telomere length from a single blood draw using a real-time PCR technique. We examined the reliability of telomere length measurement using sequential samples collected over a 9-month period. METHODS AND FINDINGS Relative telomere length in peripheral blood was estimated usi...

Visit SCRC The SCRC welcomes visitors during its normal hours of operation. Before you make the trip, please take a moment to read our tips for visiting. You may be able to save yourself a trip. Depending on the nature and extent of your research, our staff can often supply you with the materials you need by mail or electronic mail. If you have any questions about items you locate through our o...

Visit SCRC The SCRC welcomes visitors during its normal hours of operation. Before you make the trip, please take a moment to read our tips for visiting. You may be able to save yourself a trip. Depending on the nature and extent of your research, our staff can often supply you with the materials you need by mail or electronic mail. If you have any questions about items you locate through our o...

Two multivehicle routing problems are considered in the framework that a visit to a location must take place during a specific time window in order to be counted and all time windows are the same length. In the first problem, the goal is to visit as many locations as possible using a fixed number of vehicles. In the second, the goal is to visit all locations using the smallest number of vehicle...