Abstract
References
1.
Engels
E P
Smith
R C
Krantz
S
. (1960 ) Radiology
75 , 242 .
2.
Langley
G R
Sabean
H B
Sorger
K
. (1966 ) Canad. med. Ass. J.
94 , 940 .
3.
Sharnoff
J M
Belsky
H
Melton
J
. (1954 ) Amer. J. Med.
17 , 582 .
4.
Wideback
A
. (1956 ) Acta med. scand.
153 , 499 .
5.
Czitober
H
Moser
K
Grundig
E
. (1967 ) Klin. Wschr.
45 , 73 .
6.
Goldberg
A F
Takakura
K
Rosenthal
R L
. (1966 ) Nature (Lond.)
211 , 41 .