Leong recognised the difficulties faced by families in such situations .
Leong founded the Viva Foundation to help children with cancer to improve the survival rate and cure of children with cancer , especially childhood leukemia , in Singapore and Southeast Asia .
Recognising the difficulties faced by families in such situations , Leong founded the Viva Foundation to help children with cancer to improve the survival rate and cure of children with cancer , especially childhood leukemia , in Singapore and Southeast Asia .