Sigler, L.H. : Cardiac disability and death caused by strainJ. A. M. A.,154 : 294, 1954.
2.
Mcguire, J., Green, R.S., Courter, S., Hauenstein, V., Braunstein, J.R., Plessinger, V., Iglauer, A., AND Noertker, J.: Bedpan deathsTr. Am. Clin. & Climatol. A., 60: 78, 1949.
3.
Bockus, H.L.: Gastroenterology, Vol II, p. 522. W. B. Saunders Company, Philadelphia, 1944.
4.
Steigmann, F.: Newer drugs in the therapy of constipation, p. 282. In Disturbances in Gastrointestinal Motility (Edited by J. Alfred Rider and Hugo C. Moeller, Charles C Thomas, Springfield, Illinois, 1959).
5.
Adams, R.D., Beeson, P.B., Resnick, W.H., Thorn, E.W., AND Wintrobe, M.M.: In Principles of Internal Medicine, Ed. 2, p. 516. Edited by T. R. Harrison, et al.; McGraw-Hill Book Company, Inc., New York , 1954.
6.
Halpern, A. , Shaftel, N., Selman, D., Shaftel, H.E., Kuhn, P.H., Samuels, S.S., AND Birch, H.G.: The straining forces of bowel functionAngiology , 11: 426, 1960.
7.
Yasuna, A.D. , AND Halpern, A.: The timed integration of stool hydration and peristaltic stimulation in constipation correctionAm. J. Gastroenterol., 28 : 530, 1957.
8.
Bulbring, E. , AND Crema, A.: Observations concerning the action of 5-hydroxytryptamine on the peristaltic reflexBrit. J. Pharmacol., 13: 444, 1958.
9.
Sollman, T.: A Manual of Pharmacology, Ed. 8, p. 290. W. B. Saunders Company, Philadelphia, 1957.
10.
Bülbring, E. , Lin, R.C.Y., AND Schofield , G.: An anatomical and physiological investigation of the peristaltic reflexQuart. J. Exper. Physiol., 43: 26, 1957.
11.
SCHOFIELD, G.: Cited by Bülbring and Lin, see reference 12.
12.
Bülbring, E. , AND Lin, R.C.Y.: The effect of intraluminal application of 5-hydroxytryptamine and 5-hydroxytryptophan on peristalsis ; the local production of 5-HT and its release in relation to intraluminal pressure and propulsive activityJ. Physiol., 140: 381, 1958.