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  1. M K DAVIES,

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This 1979 stamp from Brazil featuring the clover flower with hearts as leaves was produced to mark the 35th Brazilian Cardiology Congress, which is signified in the inscription on the left side of the stamp. The inscription underneath the stamp design indicates that this stamp is also a tribute to Carlos Ribeiero Justiniano Chagas (1879–1934) who described the clinical and cardiac manifestations of Trypanosoma cruziinfection (Chagas disease).