↑ "Presidential Dentist Visits U-M" (PDF). University of Michigan School of Dentistry. Spring–Summer 2006. p. 29. Archived from the original (PDF) on 2006-10-14. สืบค้นเมื่อ 2009-01-28. Worm told the dental students that in addition to an operatory in the basement of the White House, there is a dental clinic at the presidential retreat at Camp David, Maryland.
