1Department of Oral Radiology, University of Stellenbosch, South Africa
2Department of Oral Pathology, University of Stellenbosch and Oral Epidemiology Research Group of the South African Medical Research Council, South Africa
3Department of Oral Surgery, University of the Western Cape, South Africa
Tài liệu tham khảo
Nortjé, 1977, British Journal of Oral Surgery, 15, 55, 10.1016/0007-117X(77)90008-7