Using modern platelet aggregometers, it is possible to evaluate platelet secretion simultaneously, by measuring release of ATP by the aggregating platelets. Measurement of platelet secretion allows the laboratory diagnosis of secretion defects with greater sensitivity than platelet aggregation testing alone.
Windows XP has long been an OS Microsoft begrudgingly kept alive far longer than it could have ever imagined. Initially released in 2001, official support for Windows XP persisted all the way through April 2014. At the time, Microsoft noted that after 13 years of support, it was time for the company to look forward, unencumbered by outdated software.
Both Windows 95 line and NT 4.0 were officially stamped as Windows version 4 (or variants such as Windows 98 being 4.1); Windows 2000 was christened as version 5 and XP anointed as Windows version 5.1 (due to its being built on the NT/2000 codebase).