By the early 1930s, Klara Zetkin was suffering from the heart problems from which she would soon die. In the meantime, she needed injections of camphor to raise her blood pressure. On the occasion of one such injection, the nurse administering the stimulant began to prepare her left buttock. Zetkin instructed the nurse to find another site on her body. ‘That one’, she said, ‘belongs to Dr Zamkov’.