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Treatment includes special education programs and various types of therapy .  Surgery may be done to correct heart problems.  Dietary changes or medications may be required for high blood calcium.  The syndrome was first described in 1961 by New Zealander John C. P. Williams .   Williams syndrome affects between 1 in 7,500 to 1 in 20,000 people at birth.  Life expectancy is less than that of the general population, mostly due to the increased rates of heart disease.