?


Arthur Earl
Walker

Johns Hopkins
?


Claude
Bertrand

Hôpital Notre Dame, Montreal


Francisco
Velasco

hospital general de mexico








Carl Emil
Seashore

University of Iowa


Lee Edward
Travis

University of Iowa






Walter Bradford
Cannon

Harvard Medical School








Marcos
Velasco

hospital general de mexico

Fiacro
Jiménez Ponce

hospital general de mexico
(Options)

Fiacro Jiménez PonceX