DOI: https://doi.org/10.18597/rcog.1505
DOI: https://doi.org/10.18597/rcog.1508
DOI: https://doi.org/10.18597/rcog.1520
DOI: https://doi.org/10.18597/rcog.1530
DOI: https://doi.org/10.18597/rcog.1532
DOI: https://doi.org/10.18597/rcog.1534