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2. Ed. Karim, S.M.M. The Prostaglandins, Progress in Research p. 192-5
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4. The effect of prostaglandin E1 on responses of smooth muscle to cathecholamines, angiotensin and vasopressin;Holmes;Br. J. Pharmacol.,1963
5. Plasma renin in normal pregnancy;Brown;Lancet,1963