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spec: Mistakes can be serious and costly , inhibiting investment . Do not override this message , even if a prescriber is aware of a previous prescription for drugs containing nitrates . Its exemplary qualities are the system 's ability to provide accurate and timely notification to a large number of victims with limited staffing . Consumers should ignore these letters and e-mail messages , even though there is a temptation for tremendous wealth . Do not reply to these messages , even to remove yourself from a mailing list . So , it 's a real pleasure ...