Dear Lyne.
Sad to hear, but don't give up because there's always hope. To me it seems that Lu Zuckerman is a tough one and hard to beat and you may just as well expect him to shake this off very soon.
It certainly feels very strange to read through these posts about your father, who is a complete stranger to me, and be so moved by it but it surely touches a string in my heart. I can relate to your feelings since I have walked the same steps with my father a few years back.
Now I believe is the time to say all the little things you have always wanted to tell your father.
Please give him my best regards and tell him that I, and many others, are looking forward reading his posts again.
A little prayer for you from Iceland,
Karl.