Chromosome 18 markers: Linked or not linked to bipolar affective disorders in the Old Order Amish? A reply to Gershon et al.

We appreciate the careful review of our paper by examining linkage of bipolar affective disorder (BAD) to markers on chromosome 18. These authors have raised several issues concerning our article and specifically challenge our conclusion concerning the presence or absence of a major susceptibility locus for BAD on chromosome 18 in the Old Order Amish sample. 9 refs.