DOI: https://doi.org/10.18597/rcog.1876
DOI: https://doi.org/10.18597/rcog.1878
DOI: https://doi.org/10.18597/rcog.1880
DOI: https://doi.org/10.18597/rcog.1881
DOI: https://doi.org/10.18597/rcog.1883
DOI: https://doi.org/10.18597/rcog.1885