Vitamin K and childhood cancer : analysis of individual patient data from six case-control studies

E. Roman, N. Fear, P. Ansell, D. Bull, G. Draper, P. Mckinney, Jörg Michaelis, S. Passmore & R. Von Kries
To investigate the hypothesis that neonates who receive intramuscular vitamin K are at an increased risk of developing cancer, particularly leukaemia, a pooled analysis of individual patient data from six case-control studies conducted in Great Britain and Germany has been undertaken. Subjects comprised 2431 case children diagnosed with cancer before 15 years of age and 6338 control children. The retrospective assessment of whether or not an individual baby received vitamin K is not straightforward. In...
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