Bernadino Ramazzini's famous quote,
" When a doctor visits a working-class home, he should be content to sit on a three-legged stool if there isn't a gilded chair, and he should take time for his examination: and to the questions recommended by Hippocrates, he should add one more - "What is your occupation?"
Percival Pott and chimney sweeps cancer: Sir Percival Pott discovered the first occupational cancer where he identified scrotal cancer among men who worked as chimney sweeps in London. As chimneys were crusted with coal combustion byproducts and the chimney sweeps were to climb up the chimneys to clean them up, this activity exposed them to high concentration of coal combustion products that led to cancer of scrotum in these group of workers.