 11. Women of childbearing potential must have a negative serum pregnancy test performed within 7 days prior to the start of treatment. Standard Nuclear Medicine department pregnancy screening will be conducted prior to each 99mTc-sestamibi scan. Women of childbearing potential and men must agree to use adequate contraception prior to study entry and for the duration of study participation. The investigator is requested to advise the patient how to achieve an adequate contraception. 