DOI: https://doi.org/10.18597/rcog.2258
DOI: https://doi.org/10.18597/rcog.2263
DOI: https://doi.org/10.18597/rcog.2264
DOI: https://doi.org/10.18597/rcog.2271
DOI: https://doi.org/10.18597/rcog.2274