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Larsson JO, Lichtenstein P, Fried I, El-Sayed E, Rydelius PA.Larsson JO, et al. Among authors: lichtenstein p.Acta Paediatr. 2000 Dec;89(12):1469-73. doi: 10.1080/080352500456660.Acta Paediatr. 2000.PMID: 11195238