Differences in Inducing Activity for Human Bone Marrow Colonies in Normal Serum and Serum From Patients With Leukemia

In the article: "Difference in inducing activity for human bone marrow colonies in normal serum and serum from patients with leukemia," by Mintz and Sachs (Blood: 42, No. 3, September 1973, p. 331-339), on page 331, first paragraph of the text, line 7, it should be 15-18 instead of 15-19. The last reference number in this paragraph should be 19 instead of 23. Also, on page 337, line 4 of the first paragraph of the Discussion, the reference number should be 19 instead of 23.