Evaluating cut‐off levels for progesterone, β human chorionic gonadotropin and β human chorionic gonadotropin ratio to exclude pregnancy viability in women with a pregnancy of unkn... by Shabnam Bobdiwala, Christopher Kyriacou, Evangelia Christodoulou, Jessica Farren, Nicola Mitchell‐Jones, Maya Al‐Memar, Francis Ayim, Baljinder Chohan, Emma Kirk, Osama Abughazza, Bramara Guruwadahyarhalli, Sharmistha Guha, Veluppillai Vathanan, Debbie Gould, Catriona Stalder, Dirk Timmerman, Ben Van Calster, Tom Bourne

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