Degenerative Diseases of the Nervous System, Parkinson Disease
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Neurological Sequelae in Twins Born After Assisted Conception: Controlled National Cohort Study
BMJ 329:311-314, Pinborg,A.,et al, 2004
Twinning and Neurologic Morbisity
Am J Dis Child 146:1110-1113, Scheller,J.M.&Nelson,K.B., 1992