You don't have to explain the reason, but put your name in "I'll Be Away For Yuletide" post and even given yourself a week if you need more time? That way your writers won't be concerned about the wait, and you can comment when you're in the right headspace.

Here's a link to the post: http://yuletide.livejournal.com/1278991.html

Also, hope you feel better soon! :(