#' @details
#' Given a data frame that includes all of the <%= MEASURE %> (Version
#' 4) items as variables, appropriately named, this function generates all of
#' the <%= MEASURE %> scale scores. It is crucial that the item variables in
#' the supplied data frame are named according to FACT conventions. For
#' example, the first physical well-being item should be named GP1, the second
#' GP2, and so on. Please refer to the materials provided by
#' \url{http://www.facit.org} for the particular questionnaire you are using.
#' In particular, refer to the left margin of the official questionnaire
#' (i.e., from facit.org) for the appropriate item variable names.
#'
#' This questionnaire consists of two components: (1) FACT-G items and (2)
#' "Additional Concerns" items. The FACT-G items (G for General) measure
#' general aspects of QoL common to all cancer patients. The "Additional
#' Concerns" items measure issues relevant for a specific cancer type,
#' treatment, or symptom. These two questionnaire components are typically
#' administered together. In some studies, however, ONLY the "Additional
#' Concerns" items are administered. The \code{AConly} argument is provided to
#' accommodate such cases, and should be set to \code{AConly = TRUE} if ONLY
#' the "Additional Concerns" items were administered.
#'
#' For more details on the \code{updateItems} and \code{keepNvalid} arguments,
#' see the documentation entry for \code{\link{scoreFACTG}} and
#' \code{\link{FACTscorer}}.
#'
#' @section Note:
#' Keep in mind that this function (and R in general) is
#' case-sensitive.
#'
#' All items in \code{df} should be \code{numeric} (i.e., of type
#' \code{integer} or \code{double}).
#'
#' This function expects missing item responses to be coded as \code{NA},
#' \code{8}, or \code{9}, and valid item responses to be coded as \code{0},
#' \code{1}, \code{2}, \code{3}, or \code{4}. Any other value for any of the
#' items will result in an error message and no scores.
#'
#' @seealso This function is very similar to the \code{\link{scoreFACTG}}
#' function. See the documentation for \code{\link{scoreFACTG}} for more
#' details on the arguments and for examples. Also see the documentation
#' entry for the \code{\link{FACTscorer}} package.
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