Green was the doctor at the centre of the Cartwright Inquiry, a commission set up to examine claims that he had been experimenting on patients without their consent between 1966 and 1987 (supposedly continuing after his retirement in 1982).
The inquiry argued that he had conducted a study between 1966 and 1987 in which the cases of women with major cervical abnormalities were followed without definitive treatment, in an attempt to prove his "personal belief" that these abnormalities were "not a forerunner of invasive cancer."