DOI: https://doi.org/10.18597/rcog.1727
DOI: https://doi.org/10.18597/rcog.1736
DOI: https://doi.org/10.18597/rcog.1739
DOI: https://doi.org/10.18597/rcog.1743
DOI: https://doi.org/10.18597/rcog.1744