10. Pregnancy and nursing. In order to avoid pregnancy, women have to be postmenopausal, surgically sterile, or use one of the following contraceptives during the whole study period and 5 days after the study has ended (i.e. 5 times plasma biological half-life of the investigational medicinal product): intrauterine devices and hormonal contraceptives (contraceptive pills, implants, transdermal patches, hormonal vaginal devices or injections with prolonged release)