Erratum
After publication of the original article [1], it came to the authors’ attention that a few values in Table 2 were added incorrectly. The correct values are as follows: for total cases ‘disk shape balloon’ and ‘ball type balloon’ the incidence observed was 0.037 % (14/38348) and 0.060 % (28/46640), respectively. All other values within Table 2 are correct.
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Hasegawa J, Sekizawa A, Ikeda T, Koresawa M, Ishiwata I, Kawabata M, Kinoshita K, Group: Japan Association of Obstetricians and Gynecologists. The use of balloons for uterine cervical ripening is associated with an increased risk of umbilical cord prolapse: population based questionnaire survey in Japan. BMC Pregnancy Childbirth. 2015;15:4.
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The online version of the original article can be found under doi:10.1186/s12884-015-0432-4.
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Hasegawa, J., Sekizawa, A., Ikeda, T. et al. Erratum to: The use of balloons for uterine cervical ripening is associated with an increased risk of umbilical cord prolapse: population based questionnaire survey in Japan. BMC Pregnancy Childbirth 16, 155 (2016). https://doi.org/10.1186/s12884-016-0948-2
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DOI: https://doi.org/10.1186/s12884-016-0948-2