6 April 1954 Dr. R. Kobayaabi = 2 : I regret that I am unable to give you the resulta of analysis of urine from the 21 other patients. Knowing that those data would be highly important to your committee in its evaluations of the medical status of these patients, we have offered to undertake radiochamical urine analysis of all 23 patiants. The urine froa only two patients has been delivered to us in time to permit shipment to the States and analyais by this date. More recently, samples from five additional patients from the Tokyo University Hospital wore delivered to us, but we have not as yot received samples from the 16 patients now hospitalized at the Daiichi Hospital. ~— Respect fully yours, Merril Bisenbud Director, Health and Safety Laboratory Unirced States Atomic Qnergy Commission ME/ans/hee COs Dr. Nakeidsuai Dr. Kakehi