DOI: https://doi.org/10.18597/rcog.1741
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DOI: https://doi.org/10.18597/rcog.1820
DOI: https://doi.org/10.18597/rcog.1823
DOI: https://doi.org/10.18597/rcog.1827
DOI: https://doi.org/10.18597/rcog.1829