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). doi: 10.12809/hkjgom.12.1.125.