Chelation therapy with 2,3-dimercaptopropane-1-sulfonate (DMPS) has been used to treat acute and chronic heavy metal poisoning. It is thought to work by forming an insoluble complex with the metal that is firmly bound to intracellular sites.
In every Polish city, the ghettos were overcrowded. Jews were transferred from the other neighborhoods in the city, and in many cases from nearby villages, to housing there, while the non-Jewish inhabitants of the neighborhood were forced to move to another area. These transfers caused great overcrowding from the outset.
In Warsaw, the capital of Poland, all 22 entrances to the ghetto were sealed. The German authorities allowed a Jewish Council (Judenrat) of 24 men to form its own police to maintain order in the ghetto.