title: Vitamin methods: 7. A new modification of the p-aminoacetophenone method for estimating nicotinic acid in urine.
authors.affiliation: Dunn Nutritional Laboratory, University of Cambridge and Medical Research Council.
authors.forename: Y L
authors.initials: YL
authors.lastname: Wang
authors.forename: E
authors.initials: E
authors.lastname: Kodicek