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Frischknecht, Fioravante; Brühwiler, Hermann; Raio, Luigi; Lüscher, Klaus Peter (2009). Changes in pre-pregnancy weight and weight gain during pregnancy: retrospective comparison between 1986 and 2004. Swiss medical weekly, 139(3-4), pp. 52-5. Muttenz: EMH Schweizerischer Ärzteverlag
