Changes in version 0.3.0 (2026-02-28)                  

  - Speed up the internal process.

                        Changes in version 0.2.0                        

  - throw an informative error for age outside range.
  - throw an informative RAM size requested.

                 Changes in version 0.1.0 (2025-10-21)                  

  - Initial CRAN submission.
  - Age-dependent disease topic modeling; utilities for ICD-10/ICD-10-CM
    mappings. Paper is accepted at Jiang et al. 2023 Nature.