No̸rgaard-Pedersen, B. Personal communication, 1972.
Seppalä, 1972, Am. J. Obstet. Gynec., 112, 208, 10.1016/0002-9378(72)90117-2
Bergstrom, 1968, Pharmac. Rev., 20, 1
Carlson, 1968, Acta med. scand., 183, 423, 10.1111/j.0954-6820.1968.tb10502.x
Carlson, 1969, Acta physiol. scand., 75, 161, 10.1111/j.1748-1716.1969.tb04368.x
Bevegård, 1969, Scand. J. clin. Lab. Invest., 23, 347, 10.3109/00365516909081700
L.A. Carlson, M. Ericsson, U. Erikson, Acta radiol. ((in the press)).
Heird, 1972, J. Pediat., 80, 351, 10.1016/S0022-3476(72)80492-X
Lackey, 1972, Pediatrics, 49, 281, 10.1542/peds.49.2.281
Harries, 1971, Archs Dis. Childh., 46, 855, 10.1136/adc.46.250.855
