title: Reply: LNG-IUDs in treating dysmenorrhea.
authors.affiliation: Wits Sleep Laboratory, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
authors.forename: Stella
authors.initials: S
authors.lastname: Iacovides
authors.affiliation: Department of Obstetrics and Gynaecology, Turku University Hospital and University of Turku, Turku, Finland.
authors.forename: Paivi
authors.initials: P
authors.lastname: Polo-Kantola
authors.affiliation: Wits Sleep Laboratory, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa Human Sleep Research Program, SRI International, San Francisco, CA, USA.
authors.forename: Fiona C
authors.initials: FC
authors.lastname: Baker
mesh_terms: D003271:Contraceptive Agents, Female; D004412:Dysmenorrhea; D005260:Female; D006801:Humans; D007436:Intrauterine Devices, Medicated; D016912:Levonorgestrel
chemical_list: D003271:Contraceptive Agents, Female; D016912:Levonorgestrel