(1)
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.; SIN, W. The Use of Birth Ball As a Method of Pain Management in Labour. Hong Kong J Gynaecol Obstet Midwifery 2023, 12.