of;
Biochemistry,;
Faculty;
of;
Science,;
University;
of;
Douala,;
Douala;
24157,;
Cameroon;
of;
Nutritional;
Science,;
University;
of;
Potsdam,;
Potsdam;
114-115;
D-14558,;
Germany;
of;
Food;
Safety;
and;
Food;
Quality,;
University;
of;
Gent,;
Ghent;
653,;
B-9000,;
Belgium;
and;
Nutrition,;
University;
of;
Lubbok,;
Lubbock;
79423,;
USA;
of;
Biochemistry,;
University;
of;
Ngaoundere,;
Ngaoundere;
454,;
Cameroon;
of;
Paediatrics,;
Faculty;
of;
Medicine;
and;
Biomedical;
Sciences,;
University;
of;
Yaoundd,;
Yaounde;
2036,;
Cameroon;
维生素A缺乏症; 铁含量测定; 血清锌; 喀麦隆; 清水; 饮食; 青少年; 原子吸收分光光度法;