Original sentence: In 1936, he received his medical doctorate and passed the Membership of the Royal College of Physicians (MRCP) exam, after which he worked in several Liverpool hospitals in junior roles—including as a registrar under Henry Cohen
Edited sentence: After working in a series of junior medical positions, his applications for more senior posts were rejected because of his Jewish parentage.Born and educated in Liverpool, Pappworth graduated as a Bachelor of Medicine, Bachelor of Surgery in 1932 from Liverpool University.He served in the Royal Army Medical Corps in the Second World War, before setting up in London as an independent medical consultant and tutor.His contact with junior doctors led him to investigate the ethics of medical research on humans.In 1936, he received his medical doctorate and passed the MRCP exam, after which he worked in several Liverpool hospitals in junior roles—including as a registrar under Henry Cohen.Pappworth's teaching of postgraduate students had a profound effect on the Membership of the Royal College of Physicians (MRCP) examination pass rate.The publication of Human Guinea Pigs, which examined unethical medical research practices, exposed the subject to a wider audience and led his becoming persona non grata within the medical establishment for much of his career, but ultimately helped lead to the introduction of stricter codes of practice for human experimentation