1 RADIOCHEMICALS-NAMELY, CHEMICAL COMPOSITIONS CONTAINING RADIOACTIVE ISOTOPES AND RADIOACTIVE DIAGNOSTIC REAGENTS FOR IN VITRO USE; RADIOIMMUNOASSAY KITS CONTAINING COMPONENTS FOR IN VITRO DIAGNOSTIC USE FOR MEASUREMENT OF GASTRIN AND HORMONES; KITS CONTAINING HORMONES AND OTHER COMPONENTS FOR IN VITRO MEDICAL ANALYSIS; KITS CONTAINING COMPONENTS FOR EVALUATION OF THYROID FUNCTIONS; PYROPHOSPHATE KITS CONTAINING I.V. INJECTION COMPONENTS FOR DIAGNOSTIC AID; REAGENTS FOR KITS FOR IN VITRO ANALYSIS; KITS FOR THE PREPARATION OF VARIOUS COMPOUNDS OF INDIUM 113M AND TECHNETRIUM 99M; CHEMICAL MOLECULES FOR IN VITRO USE; PARTLY RADIOACTIVE ELEMENTS USED AS TRACERS-NAMELY, TRITIUM AND DEUTERIUM TARGETS FOR PARTICLE ACCELERATORS; SOLVENT COMPOSITIONS FOR PAPER CHROMATOGRAPHY; LABELLED COMPOUNDS, NAMELY, COMPOUNDS LABELLED BY CHEMICAL SYNTHESIS OR BIOSYNTHESIS; RADIOISOTOPE SOURCES FOR RADIOCURIETHERAPY, NAMELY, CAESIUM, COBALT, GOLD, IRIDIUM, PHOSPHORUS AND YTTRIUM; CAESIUM SOURCES FOR GYNAECOLOGICAL PLESIOCURIETHERAPY AND TELETHERAPY IN PELLET FORM; GAMMA SOURCES FOR THE CALIBRATION OF GAMMACAMERAS USED IN MEDICAL SCINTIGRAPHY