modules are also held at the postgraduate hospitals, where much of the faculty's research is based: Postgraduate hospitals Royal Brompton Hospital Harefield Hospital Queen Charlotte's & Chelsea Hospital Western Eye Hospital District general hospitals Ashford Hospital Central Middlesex Hospital Ealing Hospital Hillingdon Hospital Mount Vernon Hospital Northwick Park Hospital St Mark's Hospital West Middlesex Hospital St Peter's Hospital, Chertsey Mental health hospitals St. Bernard's Hospital St. Charles' Hospital Three Bridges Medium Secure Unit Gordon Hospital Broadmoor Hospital Cassel Hospital Clinical attachments and teaching in years 1 (two weeks), 2 (five weeks), 3 (30 weeks), 5 and 6 (all year) are held at these hospitals. These hospitals also have small research divisions which are part of the Imperial College Faculty of Medicine. Notable staff and alumni The list below, including five Nobel Laureates in Physiology and Medicine, shows the notable past or current staff and alumni from Imperial College School of Medicine or from the various institutions which are now part of it. Christopher Addison (Ex Leader of the House of Lords, Ex Minister for Health) Charing Cross Hospital N.H. Ashton (ophthalmologist, Buchanan medalist) Sir Ernst Chain (Nobel Laureate, Physiology and Medicine) Ara Darzi, Baron Darzi of Denham, Parliamentary Under-Secretary, Leading Surgeon) St Mary's Hospital Carl Djerassi (chemist; first oral contraceptive pill progestin norethisterone) Harold Ellis (surgeon and anatomist) Westminster Hospital Sir Joseph Fayrer (physician noted for his writings on medicine in India) Sir Marc Feldmann (expert on rheumatology) Kennedy Institute / Charing Cross Hospital Sir Alexander Fleming (Nobel Laureate, Physiology and Medicine) St Mary's Hospital Sir Malcolm Green, (respiratory physiologist), vice-president faculty of medicine and head of National Heart and Lung Institute. John Henry (clinical toxicologist who did crucial work on poisoning and drug overdose) St Mary's Hospital Sir Frederick Hopkins (Nobel Laureate, Physiology and Medicine) Dame Rosalind Hurley (medical microbiologist, researcher, and ethicist) Sir Andrew Huxley (Nobel Laureate, Physiology and Medicine) Thomas Huxley (notable biologist) Charing Cross Hospital Sir Bruce Keogh (medical director of the National Health Service) Dame Louise Lake-Tack, Governor-General of Antigua and Barbuda Charing Cross Hospital David Livingstone (congregationalist pioneer medical missionary in South Africa) Charing Cross Hospital Sir Ravinder Nath Maini (expert on Rheumatology) Kennedy Institute/Charing Cross Hospital Christine Moffatt (nurse in leg ulcer care) Charing Cross Hospital Albert Neuberger (chemical pathologist) St Mary's Hospital William Kitchen Parker (physician and zoologist) Charing Cross Hospital Sir William Stanley Peart (Buchanan Medalist) St Mary's Hospital Dame Julia