Through a French network for the study of Parkinson's disease genetics and extended collaborations with European, Mediterranean and other various countries, a total of 2934 subjects including 1683 patients and 1251 unaffected individuals has been collected since 2002. These samples consisted of 122 families with autosomal recessive PD, 285 cases of isolated early onset PD, 110 autosomal recessive and 129 autosomal dominant families with late onset PD, 201 isolated late onset PD cases and 250 matched controls.