Abstract

References
1.
Chait
A
(1963 ) American Journal of Roentgenology
90 , 688 –708
2.
Cheever
A E
(1968 ) American Journal of Tropical Medicine
17 , 38 –64
3.
Cheever
A E
Andrade
Z A
(1967 ) Transactions of the Royal Society of Tropical Medicine and Hygiene
61 , 626 –639
4.
Domingo
E O
Warren
K S
(1969 ) Gastroenterology
56 , 231 –240
5.
Morales
Hernandez R
Cestero
Ruiz G
(1945 ) Puerto Rico Journal of Public Health and Tropical Medicine
21 , 507 –510
6.
Keats
T E
Lipscomb
G E
Betts
C S
(1968 ) Radiology
90 , 990 –994
7.
Keefe
E J
Gagliardi
R A
Pfister
R C
(1967 ) American Journal of Roentgenology
101 , 388 –396
8.
Sherif
S M
(1970 ) British Medical Journal
i , 671 –672
