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- [3] CHANGES IN OBSTETRICS OVER PAST 20 YEARS BULLETIN DE LA SOCIETE DES SCIENCES MEDICALES DU GRAND-DUCHE DE LUXEMBOURG, 1970, 107 (01): : 71 - &
- [4] A Detailed Analysis of the Past 20 Years of US FDA-Approved Prescription to Over-the-Counter Switches Therapeutic Innovation & Regulatory Science, 2023, 57 : 1074 - 1080