Dr Bearden works on DiGeorge syndrome, likewise eponymously identified in 1968, and caused by a deletion of part of chromosome 22. Both have counterparts, noted more recently, that result from an extra copy of the labile chromosomal section.

Bearden 博士致力于研究 DiGeorge 综合症，该综合症同样于 1968 年以同名身份确定， 由 22 号染色体的一部分缺失引起。最近注意到， 两者都有对应物， 是由不稳定染色体部分的额外副本引起的。