Given a 3-digit ICD-10-GM code, this function will generate the URL of the
corresponding page of the BfArM ICD-10-GM browser, and use browseURL() to
open it.
Arguments
- icd3
- 3-digit ICD-10-GM code (e.g. "A01") 
- year
- ICD-10-GM version (default: most recent available version). Only works for year >= 2009. 
- open_browser
- Whether to open the ICD-10-GM documentation in the default browser (Default: TRUE, as this is the primary intention of the function) 
Value
Called for side-effect, but returns the URL invisibly
icd_search() to search for a string in the ICD-10-GM labels
icd_lookup() to lookup an ICD-10-GM code in the console
