Regarding “Fact and fiction surrounding the discovery of the venous valves”

References 

1. Portal A. Historie de l'anatomie et de la chirurgie. Paris: Didot; 1770-3.
2. Florens MJP. Historie de la decouverte de la circulation du sang. Paris: Garnier; 1857;
3. Leibowitz JO. The history of coronary heart disease. London: Wellcome Institute of the History of Medicine; 1970;