Sorry! You must be logged in to read this post. Please sign up for your FREE MY-DSC account here. Login Tags:catatoniacognitionconsensuscriteriaDelphi methodDown syndromedown syndrome disintegrative disorderDown syndrome regression disorderDSDDDSRDencephalopathyindicatorsloss of skillsneurocognitive regressionquality of liferegressionunexplained regression in down syndromeURDS