Patients wear headphones during surgery so that any noise associated with their operation is drowned out.
However, they did find that women undergoing breast enhancement surgery were running extra risks - but mainly associated with the operation itself.
There are certain dangers associated with the operation of home security systems themselves (such as whether the alarm will sound properly when tripped) and the monitoring services related to these systems (such as whether the security company operator and the police will respond quickly).
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"Immediate checks revealed that the augering operation was associated with construction activity on land about 13 metres (42ft) above the top of the tunnel, " it added.
To put it simply, they decide to stay informal because the total costs of entry, operation and exit associated with joining the formal sector are greater than the potential benefits.
Aminta Granera told the Associated Press news agency that the elaborate operation was aimed at smuggling cash through Nicaragua to Costa Rica, further south.
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Spokeswoman Terri Nisich told the Associated Press that firefighters had begun an aggressive operation from dawn on Friday, using nine water-dropping helicopters to try to quell the flames.
That stunt-like atmosphere has drawn the interest of millions from around the world and is likely a major reason why Red Bull, a company almost entirely associated with action sports, chose to sponsor the operation.
Government prosecutors said that a federal grand jury seated in Oklahoma City, Oklahoma, returned indictments against 34 individuals associated with Legendz and 23 business entities that helped facilitate the operation.
The Pentagon reckons the country is unlikely to have one in operation before 2015, but is considering building at least two by 2020, along with associated vessels.
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However credible this assessment may be, we will endeavour - in view of the inherent uncertainties associated with any verification process, and, particularly in light of Iraq's past record of co-operation - to evaluate Iraq's capabilities on a continuous basis as part of our long-term monitoring and verification programme, in order to provide the international community with ongoing and real time assurances.
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