To the Editor:—
In view of Dr. Tainter's perfectly justified criticism we would like to submit the following addendum to the diagnostic problem "Erythremia (Polycythemia Vera), Radiation Therapy, and Leukemia."The x-ray therapy given the patient, at another institution, is detailed as follows: From Sept. 9 to Oct. 10, 1952, a field 100 centimeters square was used to treat the spleen. A total of 750 r (air) was given in nine divided doses, eight from an anterior port and one from a posterior port. From Oct. 23 to Nov. 6, 1952, an anterior port was used to treat the tibia and fibula, bilateral, entire length, giving 50 r (air) six times, making a total of 300 r (air). An anterior port was used to treat the femora, bilateral, entire length, giving 50 r (air) six times, making a total of 300 r (air). An anterior port was used to treat