twins treated for genetic disorder in the womb .
"we were quite surprised to find there were no significant differences," says study author . http://lm360.us/Kindle-grandpa-of-Metelko-from-Pite?Ketelhutn=252 .
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"we were quite surprised to find there were no significant differences," says study author . http://lm360.us/Kindle-grandpa-of-Metelko-from-Pite?Ketelhutn=252 .