A study conducted by Dr. Wald of the US National Institutes of Health of the US National Institutes of Health shows that smokers are more likely to die from monocytic and myeloid leukemias than are non-smokers. The data also suggested that even ex-smokers are significantly more at risk than those who never smoked. Professor Leo Kinlen of London Hospital in London cautioned that no cause-and-effect had been established but, he added, "the balance of evidence suggests that smoking may cause leukemia." For smokers of 10 to 20 cigarettes a day the rate of death from lymphatic leukemia was 76 percent higher, and for one to 10 cigarettes, 40 percent higher. He also wrote that leukemia should be added to the US National Institutes of Health list of tobacco-related causes of death.
A study conducted by Dr. Wald of the US National Institutes of Health of the US National Institutes of Health shows that smokers are more likely to die from monocytic and myeloid leukemias than are non-smokers. The data also suggested that even ex-smokers are significantly more at risk than those who never smoked. Professor Leo Kinlen of London Hospital in London cautioned that no cause-and-effect had been established but, he added, "the balance of evidence suggests that smoking may cause leukemia." He also wrote that leukemia should be added to the US National Institutes of Health list of tobacco-related causes of death.