"I was not sent on an exercise to apportion blame," said Mrs. Tibaijuka, who leads the Nairobi-based United Nations human settlements program, known as Habitat.
It was thought that the package had been sent as an exercise to test security procedures at the BBC HQ, but the corporation has said that this was not the case.
After 18 months, the patients with plaque detected on the test were 10 times more likely to have been sent for an exercise stress test, a nuclear medicine scan or a cardiac catheterization, compared with those patients who didn't have the test.
Throughout the study, the TERC monitored each participant's activity and exercise logs and would send an automated notification to the participant if certain criteria were met.
Next week's naval exercise will send a "clear message" to the North following the sinking in March of a South Korean naval vessel, the US defence secretary, Robert Gates, told reporters in Seoul.
He said bases and exercises would "send a message to everybody, including important countries like Uzbekistan, that we have a capacity to come back in and will come back in -- we're not just going to forget about them".
The international community has called for a fair and peaceful exercise that would send a signal to the rest of the continent.
Even if Ukraine isn't a Nato member state, such exercises would still send a signal of sorts to Moscow.
That makes it hard for the state to claim that it's merely exercising its right to send a message.
But a Beijing newspaper said the large-scale exercises were intended to send a warning to President Chen Shui-bian of Taiwan, who, the Chinese contend, harbors dreams of independence, and to the United States, which has pledged to aid Taiwan's defense.
