| http://www.w3.org/ns/prov#value | - Professionals, including teachers, lawyers, singers, actors, hawkers, radio -video jockeys, who make excessive use of their vocal chords need to be careful even at the slightest change in their voice patterns, as it may indicate anything from a common cold to a sinister pathology like cancer of the throat, said city-based ENT specialists on the World Voice Day here today.
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