author.search: no visible binding for global variable 'na.omit'
reference.list: no visible global function definition for 'na.omit'
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
checkRd: (7) references.list.Rd:14: \item in \value must have non-empty label
Found the following problems:
references.list.Rd:44:38: Warning: trimming empty <code>
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
checkRd: (7) references.list.Rd:14: \item in \value must have non-empty label
Found the following problems:
references.list.Rd:44:38: Warning: trimming empty <code>
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
checkRd: (7) references.list.Rd:14: \item in \value must have non-empty label
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
checkRd: (7) references.list.Rd:14: \item in \value must have non-empty label
author.search: no visible binding for global variable 'na.omit'
reference.list: no visible global function definition for 'na.omit'
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
checkRd: (7) references.list.Rd:14: \item in \value must have non-empty label
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable 'na.omit'
reference.list: no visible global function definition for 'na.omit'
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable ‘na.omit’
reference.list: no visible global function definition for ‘na.omit’
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.
author.search: no visible binding for global variable 'na.omit'
reference.list: no visible global function definition for 'na.omit'
Undefined global functions or variables:
  na.omit
Consider adding
  importFrom("stats", "na.omit")
to your NAMESPACE file.