was a doctor who want know what is the problem with pellagra disease, he investigate and reach the conclusion that something is missingin the food and that causes pellagra disease, he finally died with cancer in 1929 and could not know who which was missing in food.
was a doctor who want know what is the problem with pellagra disease, he investigate and reach the conclusion that something is missingin the food and that causes pellagra disease, he finally died with cancer in 1929 and could not know who which was missing in food.