Designed for guessing version of codes given to delineate a range
guess_pair_version(start, end, short_code = NULL)ICD code
ICD code
single logical value which determines whether the ICD-9
code provided is in short (TRUE) or decimal (FALSE) form.
Where reasonable, this is guessed from the input data.
Type of codes as single character "icd9" or "icd10", or
error if conflicting results