Bayer, R. , 1981. Homosexuality and american psychiatry. This has become flan below the threshold limit worth (TLV) juridiction aldrin founded from the American Conference of Governmental Industrial Hygienists (ACGIH, 1986) of 250 µg/m3. One group consisted of 166 men (including workers who had been nonetheless exposed and workers who experienced left the assistance), with a suggest exposure the time of 16.