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- [42] Natural experiments and observational studies: where and how should we draw the line? EUROPEAN JOURNAL OF PUBLIC HEALTH, 2017, 27 : 303 - 303
- [47] Twin pregnancies: Where should we manage them? Where should they deliver? JOURNAL DE GYNECOLOGIE OBSTETRIQUE ET BIOLOGIE DE LA REPRODUCTION, 2009, 38 (08): : S56 - S60