A women and her daughter take part in the 24-hour relay for life at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

People run for the 24-hour relay for life at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

People enter the colon model introducing colon cancer at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

People run along the painted paper bags at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

People run around the word "courage" that is lighted by candles in paper bags at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

People read letters written by cancer patients at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)

A girl prints her hand on a white cloth during the 24-hour relay for life at a sports center in Luxembourg, March 17, 2013. Nearly 10,000 people took part in the 24-hour relay for life from Saturday to Sunday to collect donations for cancer patients at the sports center in Luxembourg. (Xinhua/Wang Xiaojun)