A vector of values. In case of \code{ab_tradenames}, if \code{x} is of length one, a vector will be returned. Otherwise a \code{\link{list}}, with \code{x} as names.
Use these functions to return a specific property of an antibiotic from the \code{\link{antibiotics}} data set, based on their ATC code. Get such a code with \code{\link{as.atc}}.
}
\examples{
ab_atc("amcl") # J01CR02
ab_official("amcl") # Amoxicillin and beta-lactamase inhibitor
ab_official_nl("amcl") # Amoxicilline met enzymremmer