Write Excel of HemOnc's Class Hierarchy for Protege

Source: R/hemonc_to_protege.R

To print the HemOnc Class Hierarchy to the console to copy-and-paste into Protege's "owl:Thing", see print_hemonc_class_hierarchy.

excel_hemonc_class_hierarchy(
  conn,
  conn_fun,
  file = "hemonc_class_hierarchy.xlsx"
)