Hmm, I know that story.. But the thing about her not completing the cranes is a myth.. Supposedly she actually folded over 1,300 cranes before she died.
But the one where she only folded 644 is sweeter, ne? XD Cuz her friends and family helped! ^_^
Also, her wish was not just to get well. Her was was not only for her to get well, but for no child to ever die in such a way ever again.