Sotos wants the DNA test to prove it.
The head of the museum wants more information about how the artifact will be treated before he approves the testing.
Doctor wants to test Lincoln's DNA
May 5, 2009 The head of a Philadelphia museum says it might allow the testing of a sample of the 16th president's blood.
It's on a strip of pillowcase, at the Grand Army of the Republic museum. Cardiologist John Sotos believes the president had a rare genetic disorder.
