dosage

I'm a big fan of Randi and have been aware of his debunking of homeopathy. But the debunking I've seen is when things are astronomically diluted in which there's obviously no effect at all (not even an atom of the ingredient). But when my parents mail ordered homeopathic tablets for themselves...

I'm going through some medical literature that I have to summarize, and found dosages listed in "mg/m^2." It's not that critical to my work, but I figure the more I know the better. What exactly is that unit? Milligrams per meter squared? Kinda weird (and wrong, too, I'd think: wouldn't it be...