DOI: https://doi.org/10.18597/rcog.1859
DOI: https://doi.org/10.18597/rcog.1865
DOI: https://doi.org/10.18597/rcog.1867
DOI: https://doi.org/10.18597/rcog.1870
DOI: https://doi.org/10.18597/rcog.1872
DOI: https://doi.org/10.18597/rcog.1873
DOI: https://doi.org/10.18597/rcog.1874