1. Breast Unit, Department of Obstetrics and Gynaecology, Hospital Universitari Mútua Terrassa, Universitat de Barcelona, Barcelona, Spain
2. Department of Nursing, Breastfeeding Consultant, Promotion and Supporting Program, Institut Català de la Salut, ASSIR Mollet, Barcelona, Spain
3. Department of Obstetrics and Gynaecology, Clínica Sant Josep, Manresa, Barcelona, Spain
4. Department of Gynaecology, Hospital Universitari Mútua Terrassa, Universitat de Barcelona, Barcelona, Spain