How can brothers or sisters with PD help the study?
We need pairs of brothers or sisters who both have Parkinsons Disease to help us find the genes that might be responsible for their PD. To do this, we need a blood sample from you and each brother or sister who has PD. In addition, we need information to be sure that you have PD; we need information about your family history of PD, whether other relatives may have (or had) PD. Finally, we need information about your medical history.
