CONTENTS Tntrodction... cece cece cette eect e ee renee sent e ees setennerettietoesetessetetieseiseresnesees 1 Summaryof Past Findings. 2.000.000.0000. ceee eee eee eens reece en neteneeeneteneeeenetenietbeeeens 2 Penetrating Irradiation ..........0.00 cece ceccece cece ee cece tev eters sceteetsetennveeeeneeseneens 2 Beta Irradiation of the Skin... cece eee eens eres teiiee tn nieeeetenenneeeeeess 4 Internal Irradiation .....000.000.000 ccc ec ee eee e tect e teen eee te ete tenserteseeeenieess 3 Other Studies.............000..00. ve ieeee tees nein cee eeee tet reteceneieensieitenesneeetenertenerrctecees 3 Difficulties Associated With the Examinatioms.......0.000..0..ccc eee eee 6 Comparison Populations. .........0.....00::cccccccceeeceee eens eeeeeeneceseeseeeeeneesseeeenseeternens 6 1961 Survey — Organization and Procedures.............0.c ccc cece eect eteeeeneeeteenes 7 Examination Pacilities...0..00000..000cccccceeceeeee cence cence tetsestteceretecnenesentaseneteetenees 7 History and Physical Examinations. .........0..00000cccccecccccesesseeeetteeeseeentceseeeeney 10 Cancer Detection Survey ..........ccccccccccccceceeceneeeeensecenaeeeaeeesnesenseseneeensaseeeneess 10 Growth and Development Studies in Children... eee eters 11 AgingStudies... eee eeeeece er tnte ee tee tenses ttasegetenieieteeetegcnnieeeeeees 11 Dental Survey..............ccccccccce cee cee eee cecnececceucecseeecuseeccceeseccseesesiseesetsaseecseseetnnens 12 Laboratory Procedures.........0.. cece ccc cecceccee eee ceeeseeeeeceeseeeeeeeseeeeeetecteeeeeeesas 12 Radionuclide Body Burden Evaluation... ccc eeeeeetteeeeneees 12 Ll sge cS bs