Bob,
Our thoughts and prayers continue to be with you as well as for the doctor who will be operating (for skill, wisdom, and understanding).
David
PS My father, also sends his best wishes for a speedy recovery. I remember how, when he was recovering from his heart surgery, he felt old and like there wasn't much point in going on, and yet once he recovered, we have gone on many great trips, including the one we're now on. Recover well and speedily.