DOI: https://doi.org/10.18597/rcog.2018
DOI: https://doi.org/10.18597/rcog.2022
DOI: https://doi.org/10.18597/rcog.2029
DOI: https://doi.org/10.18597/rcog.2032
DOI: https://doi.org/10.18597/rcog.2041
DOI: https://doi.org/10.18597/rcog.2050