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Alvaro Alvim

Alvaro Freire de Villalba Alvim, Brazilian radiologist (Vassouras, Rio de Janeiro State 16 April 1863 - Rio de Janeiro 21 May 1928)
 
 
ACHIEVEMENTS
 
Obtained the first radiography of xiphopagus in the world (1897) permitting Chapot-Prevost perform his operation. 
 
Invented leaded paper