Didn't you just?
Well, of course there are ways to rephrase most anything. I am, however, interested in whether there's a way to express the "a relative of one patient" notion through the possessive 's.
A related question is whether a native speaker would be sure that one patient's relative necessarily means the relative, or he would be ambiguous whether it means the relative or a relative.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Of course, for "every Monday", the last one should have been dated July 22-28. *cough*