LONDON, England (CNN) -- Earlier this week, the case of Hiroki Ando, the Japanese 11-year-old boy who was denied a heart transplant in Japan, highlighted the vast cultural divide in attitudes towards organ transplant and availability worldwide. 

Hiroki plays catch at the Tokyo Women's Medical University Hospital. 

Hiroki had to travel to the U.S., where he is awaiting a heart, because Japan prohibits organ transplants involving children. 

His story highlights the wide range of policies around the world regarding organ donation. Watch Hiroki's trip to the U.S. » 

Organ donation has saved and improved countless lives. But medical advancements have led to a rise in demand for organs that is outpacing donation rates. 

Some countries, particularly Spain, have succeeded in raising the number of organ donors, but there is still much room for improvement, according to Leo Roels, managing director of the Donor Action Foundation. 

"What we see in our experience in so many countries is that there is still a lot of potential when it comes to identifying donors," he told CNN. 

The Donor Action Foundation is a non-profit group that helps hospitals implement programs designed to improve their donation rates. It's active in 17 countries worldwide. 

Looking at deceased donors per million population -- a commonly used benchmark -- rates vary widely around the world. 

Spain leads internationally with 34 deceased donors per million population, according to figures from the International Registry of Organ Donation and Transplantation. 

Australia, on the other hand, noticeably lags countries with comparable health care systems with just 12 deceased donors per million population.  QUESTIONS:

Q1:
1. What is Hiroki Ando's age?
2. State the age of Hiroki Ando.
3. Tell us how old Hiroki Ando is.
Q2:
1. Where does Hiroki Ando come from?
2. What country is Hiroki Ando from?
3. What nation does Hiroki Ando hail from?
Q3:
1. What country is Hiroki Ando visiting?
2. To which country is Hiroki Ando traveling?
3. Where is Hiroki Ando going?
Q4:
1. Why is Hiroki Ando going to the United States?
2. What is the reason for Hiroki Ando's visit to the US?
3. For what purpose is Hiroki Ando travelling to the United States?
Q5:
1. Hiroki Ando couldn't get a heart transplant in Japan?
2. Was Hiroki Ando unable to get a heart transplant in Japan?
3. Was a heart transplant not available for Hiroki Ando in Japan?
Q6:
1. Who are heart transplants prohibited for in Japan?
2. Who is not allowed to have heart transplants in Japan?
3. Who does Japan not allow to have heart transplants?
Q7:
1. Is it just heart transplants that are restricted for children in Japan?
2. Does Japan only ban children from heart transplants?
3. Is the heart the only organ that isn't allowed to be transplanted in children in Japan?
Q8:
1. What is Leo Roels employed as?
2. How is Leo Roels employed?
3. What does Leo Roels do for a living?
Q9:
1. Where does Leo Roels work?
2. Who is the employer of Leo Roels?
3. Where is Leo Roels employed?
Q10:
1. Who does the Donor Action Foundation help?
2. Who is the Donor Action Foundation there to provide services to?
3. Who receives aid from the Donor Action Foundation?
Q11:
1. What does the Donor Action Foundation help hospitals with?
2. What sort of aid do hospitals receive from the Donor Action Foundation?
3. What does the Donor Action Foundation do for hospitals?
Q12:
1. What is the Donor Action Foundation trying to increase?
2. What does the Donor Action Foundation want to see an increase in?
3. What is the Donor Action Foundation trying to bump up?
Q13:
1. What does the Donor Action Foundation want more donations of?
2. The Donor Action Foundation is attempting to increase donations of what?
3. What is the Donor Action Foundation trying to get more people to donate?
Q14:
1. How many nations does the Donor Action Foundation partner with?
2. How many countries is the Donor Action Foundation working in?
3. In how many countries is the Donor Action Foundation active?
Q15:
1. What country has the least amount of organ donors?
2. What is the country with the worst rate of organ donation?
3. Which nation has the smallest rate of organ donation?
Q16:
1. What is Australia's donors per million rate?
2. How many organ donors does Australia have per million?
3. How many organ donors per million are there within Australia?
Q17:
1. Who leads world organ donation rates?
2. What nation is the world leader in organ donations?
3. What country has the best rate of organ donation?
Q18:
1. What is Spain's donors per million rate?
2. How many organ donors does Spain have per million?
3. How many organ donors per million are there within Spain?
Q19:
1. What has led to a need for more organ donation?
2. Why are more organ donations needed now than before?
3. What has led to an increase in demand for organ donors?
Q20:
1. Are organ donation rates keeping up with demand?
2. Has a rise in demand for organs led to a rise in organ donation?
3. Do organ donation rates match the rate of their demand?
