DOI: https://doi.org/10.18597/rcog.1896
DOI: https://doi.org/10.18597/rcog.1901
DOI: https://doi.org/10.18597/rcog.1904
DOI: https://doi.org/10.18597/rcog.1908
DOI: https://doi.org/10.18597/rcog.1915