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8. A controlled study of the effect of oral contraceptives on migraine. Ryan RE Headache; 1978 Jan; 17(6):250-2. PubMed ID: 621146 [No Abstract] [Full Text] [Related]
9. Oral contraceptives and subarachnoid haemorrhage. Finn R; Hill CA Lancet; 1978 Sep; 2(8089):582. PubMed ID: 79955 [No Abstract] [Full Text] [Related]