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2) Ritchie C: Clinical contribution to the pathodiagnosis and treatment of certain chronic diseases of the heart. Edinburgh Med J 2: 2, 1850.
3) Porak C: De l'infiuence reciproque de la grossesse et des maladies du coeur, thesis, Paris, 1880.
4) Meadows WR: Idiopathic myocardial falure in the last trimester of pregnancy and the puerperium. Circulation 15: 903, 1957.