The orthodox explanation for the less favourable life-chances of various minorities relates to racial prejudice. There may however be other reasons. Kelly, Yvonne; Sacker, Amanda; Schoon, Ingrid; Nazroo, James (2006) Ethnic differences in achievement of developmental milestones by 9 months of age: the Millennium Cohort Study, Developmental Medicine & Child Neurology 2006, 48: 825–830 McIntosh, Hugh (1997) Why Do African- American Men Suffer More Prostate Cancer?, Journal of the National Cancer Institute, Volume 89, Issue 3, 5 February 1997, Pages 188–189 Secondary Sexual Characteristics in Boys: Data From the Pediatric Research in Office Settings Network Marcia E. Herman-Giddens, Jennifer Steffes, Donna Harris, Eric Slora, Michael Hussey, Steven A. Dowshen, Richard Wasserman, Janet R. Serwint, Lynn Smitherman and Edward O. Reiter Pediatrics November 2012, 130 (5) e1058-e1068; DOI:
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