Lane-Clayton's study was published by the British Ministry of Health. Her work on cancer epidemiology was continued by Richard Doll and Austin Bradford Hill. They used the same ways of studying cancer as Lane-Clayton, but they looked at a different kind of cancer: lung cancer. In 1956, they published their results in a paper called "Lung Cancer and Other Causes of Death In Relation to Smoking. A Second Report on the Mortality of British Doctors" (also called the British doctors study). Later, Richard Doll left the London Medical Research Center (MRC), and started the Oxford unit for Cancer epidemiology in 1968. By using computers, this unit was able to do something new and very important: it brought together large amounts of cancer data (pieces of information about cancer). This way of studying cancer is very important to cancer epidemiology today, and it has also been very important in shaping what we now know about cancer and what the rules and laws about the disease and public health are today. Over the past 50 years, many different people have done a lot of work to collect data from different doctors, hospitals, areas, states, and even countries. This data is used to study whether different kinds of cancer are more or less common in different areas, environments (for example, in big cities compared to the countryside), or cultures. This helps people who study cancer to figure out what makes people more or less likely to get different kinds of cancer.