DOI: https://doi.org/10.18597/rcog.1638
DOI: https://doi.org/10.18597/rcog.1641
DOI: https://doi.org/10.18597/rcog.1645
DOI: https://doi.org/10.18597/rcog.1648
DOI: https://doi.org/10.18597/rcog.1650
DOI: https://doi.org/10.18597/rcog.1652
DOI: https://doi.org/10.18597/rcog.1653