1. VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania, Weill Cornell Medical College, New York, New York, and Weill Cornell Medical College and Hamad Medical Corporation, Doha, Qatar (A.A.B.)
2. Yale School of Medicine, New Haven, Connecticut (S.B.O.)
3. VA Pittsburgh Healthcare System, Pittsburgh, Pennsylvania (P.Y.)
4. VA Pittsburgh Healthcare System and University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania (O.S.S.)
5. VA Pittsburgh Healthcare System, University of Pittsburgh School of Medicine, and University of Pittsburgh, Pittsburgh, Pennsylvania (F.B.M.).