其他的医生在寻找治疗佝偻病和糙皮病的食物。
Other doctors looked for foods to cure the diseases rickets and pellagra.
糙皮病是一种由烟酸缺乏引起的疾病。
然而，糙皮病在当时的美洲几乎还不为人所知，甚至在主要以玉米为生的人之间也是如此。
Pellagra was virtually unknown at that time in the Americas, however, even among people who subsisted primarily on maize.
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