title: Simplification of vitamin tests: The effect of giving doses half-weekly for vitamin A tests, and once only for vitamin D tests, instead of giving doses daily.
authors.affiliation: The Pharmacological Laboratory, Pharmaceutical Society of Great Britain, London.
authors.forename: K H
authors.initials: KH
authors.lastname: Coward
authors.forename: K M
authors.initials: KM
authors.lastname: Key