“…In all, 70 % of his control infants had been breast fed during the first two weeks of life, compared with only 56% of the index cases. A similar finding was obtained in the Canadian study of Steele, Kraus, and Langworth (1967), but in three more recent studies (Froggatt, Lynas, and MacKenzie, 1971;Kraus, Steele, Thompson, and de Grosbois, 1971;Rhead, Schrauzer, and Saltzstein, 1973) there were no significant differences between the series.…”