[Study on consequences of radioactive iodine pollution and iodine prophylaxis after the Czernobyl accident in the Krakow region].

Program of investigations of effects of radiation and iodine prophylaxis undertaken after Czarnobyl accident in Kraków region had to be modified due to goiter endemy in this region. These modifications included: 1) Division of the region into 3 areas (voivodship Nowy Sacz, urban voivodship Kraków and area of Kielce and Swietokrzyskie mountains). 2) Study on iodine uptake in food and urinary secretion. 3) Examination of iodine level in drinking water, add an attempt of calculation of radiation dose absorbed by thyroid. Characterization of selected areas, principles of selection of study groups are presented as well as organizational details and methods of data collection.