other 2011 Letter in response to Levonorgestrel-releasing intrauterine system (Mirena®) and Depot medroxyprogesterone acetate (Depo-Provera) as long-term maintenance therapy for patients with moderate and severe endometriosis: a randomised trial by Wong AYK, Tang LCH, Chin RKH Aust N Z J Obstet Gynaecol 2010; 50 (3): 273-279 The Australian & New Zealand journal of obstetrics & gynaecology ·doi:10.1111/j.1479-828x.2010.01240.x