"The most common symptoms of Williams syndrome are mental retardation, heart defects, and unusual facial features... many cardiac problems, commonly heart murm

"The most common symptoms of Williams syndrome are mental retardation, heart defects, and unusual facial features... many cardiac problems, commonly heart murmurs and the narrowing of major blood vessels as well as supravalvular aortic stenosis (SVAS)... hyperacusis and phonophobia which resembles noise-induced hearing loss, but this may be due to a malfunctioning auditory nerve... problems with visual processing, but this is related to difficulty in dealing with complex spatial relationships rather than to issues with depth perception" It is entirely in keeping with Mother Nature that in order to get what you want, you have to make significant tradeoffs.