Hey Terry,

No, I don't object at all.  Just give as the source the SAS archive
at NC State, with my name in tiny print somewhere.  No disclaimer needed
after the macro has been used unchanged for about 7 years.

Here's the language I use for the macros:

SAS macros mentioned in the text are also in the public domain in the
SAS software archive operated by the Journal of Statistical Education,
North Carolina State University, Raleigh.  Send E--mail to 
{\tt archive@jse.stat.ncsu.edu} with the message 
{\tt send software/sas/survrisk.pak}.