共 5 条
[1]
BARNARD D, 1980, ANN ROY COLL SURG, V62, P182
[3]
JACK TM, 1983, ANN ROY COLL SURG, V65, P97
[4]
LLOYD JW, 1976, LANCET, V2, P932
[5]
MAILAND O, 1981, BRIT MED J, V232, P1749