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BACKGROUND Beta blockers reduce mortality in patients who have chronic heart failure, systolic dysfunction, and are on background treatment with diuretics and angiotensin-converting enzyme inhibitors. We aimed to compare the effects of carvedilol and metoprolol on clinical outcome. METHODS In a multicentre, double-blind, and randomised parallel group(More)
Service-Level Agreements (SLAs) mitigate the risks of a service-provision scenario by associating financial penalties with aberrant service behaviour. SLAs are useless if their provisions can be unilaterally ignored by a party without incurring any liability. To avoid this, it is necessary to ensure that each party's conformance to its obligations can be(More)
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