code: def parse_disease_ids(path: str):
      
      if os.path.isdir(path) or not os.path.exists(path):
          logger.info("Couldn't find the disease identifiers file. Returning empty list.")
          return []
  
      df = pd.read_csv(path, names=["ID"])
      return set(df["ID"].tolist())
docs: Parse the disease identifier file.
  
      :param str path: Path to the disease identifier file.
      :return: List of disease identifiers.