TY - GEN AU - Berkson,Gershon TI - Early development of stereotyped and self-injurious behaviors: II. Age trends SN - 0895-8017 PY - 2003///0123 KW - Child, Preschool KW - Developmental Disabilities KW - complications KW - Humans KW - Infant KW - Infant Behavior KW - Posture KW - Self-Injurious Behavior KW - Severity of Illness Index KW - Stereotyped Behavior KW - Videotape Recording N1 - Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S UR - https://doi.org/10.1352/0895-8017(2002)107<0468:EDOSAS>2.0.CO;2 ER -