DOI: https://doi.org/10.18597/rcog.1912
DOI: https://doi.org/10.18597/rcog.1914
DOI: https://doi.org/10.18597/rcog.1916
DOI: https://doi.org/10.18597/rcog.1918
DOI: https://doi.org/10.18597/rcog.1921
DOI: https://doi.org/10.18597/rcog.1923
DOI: https://doi.org/10.18597/rcog.1926