n.意大利癞病；玉蜀黍疹；糙皮病
Chronic liver disease and pellagra patient also can produce folic acid to lack sometimes. 慢性肝病和糙皮病患者有时亦可发生叶酸缺乏。
Pellagra is caused by a severe deficiency of biologically available niacin in the diet. 饮食中严重缺乏有利人体的烟碱酸就造成糙皮病。
