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Joinson C, Heron J, Butler U, von Gontard A; Avon Longitudinal Study of Parents and Children Study Team.Joinson C, et al. Among authors: heron j.Pediatrics. 2006 May;117(5):1575-84. doi: 10.1542/peds.2005-1773.Pediatrics. 2006.PMID: 16651311
von Gontard A, Heron J, Joinson C.von Gontard A, et al. Among authors: heron j.BJU Int. 2010 Feb;105(3):396-401. doi: 10.1111/j.1464-410X.2009.08780.x. Epub 2009 Aug 13.BJU Int. 2010.PMID: 19681897