DOI: https://doi.org/10.18597/rcog.2278
DOI: https://doi.org/10.18597/rcog.2281
DOI: https://doi.org/10.18597/rcog.2285
DOI: https://doi.org/10.18597/rcog.2289
DOI: https://doi.org/10.18597/rcog.2291