Mahmud, Ayesha, Kettle, Christine, Bick, Debra, Rowley, Claire, Rathod, Trishna, Belcher, John, Abdelmaguid, Mohamed M., Ismail, Khaled M. K., "The development and validation of an internet-based training package for the management of perineal trauma following childbirth: MaternityPEARLS", POSTGRADUATE MEDICAL JOURNAL, 2013