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HAU, W.-L., TSANG, S.-L., KWAN, W., MAN, L.S.-K., LAM, K.-Y., HO, L.-F., CHEUNG, H.-Y., LAI, F.-K., LAI, C.-Y. and SIN, W. 2023. The Use of Birth Ball as a Method of Pain Management in Labour. Hong Kong Journal of Gynaecology, Obstetrics and Midwifery. 12, 1 (Mar. 2023). DOI:https://doi.org/10.12809/hkjgom.12.1.125.