Environmental Health Perspectives, Vol. 102, Supplement 8: Biostatistics in the Study of Human Cancer (Nov., 1994), pp. 47-51 (5 pages) A stratified version of nested case-control sampling which we ...

Studies of the aetiology of glioma, the commonest malignant brain tumour, with a very poor prognosis, are urgently needed, specifically to identify modifiable risk factors. The main reason that ...