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van den Berg-Emons RJ, van Baak MA, de Barbanson DC, Speth L, Saris WH.van den Berg-Emons RJ, et al.Dev Med Child Neurol. 1996 Dec;38(12):1117-25. doi: 10.1111/j.1469-8749.1996.tb15075.x.Dev Med Child Neurol. 1996.PMID: 8973297