DOI: https://doi.org/10.18597/rcog.1772
DOI: https://doi.org/10.18597/rcog.1775
DOI: https://doi.org/10.18597/rcog.1777
DOI: https://doi.org/10.18597/rcog.1778
DOI: https://doi.org/10.18597/rcog.1780
DOI: https://doi.org/10.18597/rcog.1782