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Woolf A, Wright R, Amarasiriwardena C, Bellinger D.Woolf A, et al.Environ Health Perspect. 2002 Jun;110(6):613-6. doi: 10.1289/ehp.02110613.Environ Health Perspect. 2002.PMID: 12055054Free PMC article.
Oken E, Wright RO, Kleinman KP, Bellinger D, Amarasiriwardena CJ, Hu H, Rich-Edwards JW, Gillman MW.Oken E, et al. Among authors: wright ro.Environ Health Perspect. 2005 Oct;113(10):1376-80. doi: 10.1289/ehp.8041.Environ Health Perspect. 2005.PMID: 16203250Free PMC article.