5. Mei Ling’s mother has found a new physician to help her with some pain she feels in her back. When Mei Ling’s uncle hears about the new physician, he tells the family that doctor is a quack! Mei Ling doesn't understand this phrase. What is medical quackery? Discuss an example of a famous case of quackery, and then write a sentence that explains what Mei Ling’s uncle means. How does the requirement to get a medical license help prevent medical quackery?