Long-term gonadotrophin-releasing hormone agonist (GnRHa) therapy before in vitro fertilisation (IVF) for improving fertility outcomes in women with endometriosis: a Cochrane syste... by Georgiou, E, Melo, P, Baker, P, Sallam, HN, Arici, A, Garcia-Velasco, JA, Abou-Setta, AM, Becker, C, Granne, IE