Package check result: NOTE

Check: CRAN incoming feasibility, Result: NOTE
  Maintainer: ‘Chao Cai <caic@mailbox.sc.edu>’
  
  New maintainer:
    Chao Cai <caic@mailbox.sc.edu>
  Old maintainer(s):
    Chao Cai <caic@email.sc.edu>

No changes to worse in reverse depends.