I would like to want to know how to obtain the permission to use for one / all of the following Comorbidity Scores?
If you know the contact e-mail or the respective on-line page. Thank you!
Charlson Comorbidity Index (CCI)
Elixhauser Comorbidity Index – Total Score (ETS) / Point System (EPS)
Functional Comorbidity Index (FCI)
Comorbidity Count COUNT
Rheumatic Disease Comorbidity Index (RDCI)
Psoriatic arthritis comorbidity index (PsACI)