共 18 条
[1]
CAROLL G, 1950, J AM MED ASS, V142, P85
[2]
Carroll R, 1967, J Ir Med Assoc, V60, P115
[5]
DIXON HG, 1967, LANCET, V1, P19
[7]
HENDERSON MAUREEN, 1962, AMER JOUR PUBL HEALTH, V52, P1887, DOI 10.2105/AJPH.52.11.1887
[8]
HOUSE TE, 1969, OBSTET GYNECOL, V34, P670