Zambia has five national tertiary hospitals, of which two are located in Lusaka. The larger of these is the University Teaching Hospital (UTH), which has 1655 beds and space for 250 babies. UTH serves as the highest-level hospital for a population of around 2 million people, as well as taking referrals from other health institutions around the country. It servers as Zambia's principal centre for the training of medical professionals including doctors and nurses, the latter in a specialist Nursing School within the UTH complex. Lusaka's second tertiary hospital is the Chainama Hills, which has 210 authorised beds and 167 unofficial "floor beds", is Zambia's only psychiatric hospital. The Chainama Hills site also serves as the training centre for clinical officers in Zambia.