Bracco già Italmerck Spa, Milan: correspondence with the High Commission for Hygiene and Public Health, Directorate for the supervision of the production and marketing of medicinal products, Div. I sez. 3ª, and with Bracco già Italmerck filiale di Roma, relating to the discontinuance of the marketing of the medicinal specialties "Jodo-tetragnost" and "Oral-tetragnost".