Wil H.P. Schreurs

MILD VITAMIN A DEFICIENCY AND RISK OF RESPIRATORY TRACT DISEASES AND DIARRHEA IN PRESCHOOL AND SCHOOL CHILDREN IN NORTHEASTERN THAILAND

Martin W. Bloem, Michel Wedel, ROBERT J. EGGER et al. · American Journal of Epidemiology · 1990 · 169 citations

Public Health, Child Health, Nutrition +17

Fluorometric determination of total vitamin C and total isovitamin C in foodstuffs and beverages by high-performance liquid chromatography with precolumn derivatization

Andries J. Speek, J. Schrijver, Wil H.P. Schreurs · Journal of Agricultural and Food Chemistry · 1984 · 83 citations

Agriculture, Food Science, Nutritional Sciences +15

A Reliable Semiautomated Method for the Determination of Total Thiamine in Whole Blood by the Thiochrome Method with High-Performance Liquid Chromatography

J. Schrijver, Andries J. Speek, J.A. Klosse et al. · Annals of Clinical Biochemistry International Journal of Laboratory Medicine · 1982 · 58 citations · Full text

Life Sciences, Biochemistry, Nutritional Sciences +15

Fluorometric determination of retinol in human tear fluid using high-performance liquid chromatography

Andries J. Speek, Eric J. van Agtmaal, Sastri Saowakontha et al. · Current Eye Research · 1986 · 29 citations

Agriculture, Nutritional Sciences, Chromatographic Analysis +8

Recovery of protein from tear fluid stored in cellulose sponges

Eric J. van Agtmaal, Nicolaas J. van Haeringen, Martin W. Bloem et al. · Current Eye Research · 1987 · 21 citations

Life Sciences, Biochemistry, Clinical Biochemistry +6