P. C. Wong

Academy of Medicine-Ministry of Health Clinical Practice Guidelines: assessment and management of infertility at primary healthcare level.

S. Loh, R. Agarwal, J. Quah, 2014, Singapore medical journal.

A review of maternal mortality and quality of care in the USA

P. Kitsantas, P. C. Wong, 2020, The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians.