Catholic Health Australia is the largest non-government provider grouping of health, community and aged care services in Australia. These do not operate for profit and range across the full spectrum of health services, representing about 10% of the health sector and employing 35,000 people. Catholic religious orders founded many of Australia's hospitals. Irish Sisters of Charity arrived in Sydney in 1838 and established St Vincent's Hospital, Sydney in 1857 as a free hospital for the poor. The Sisters went on to found hospitals, hospices, research institutes and aged care facilities in Victoria, Queensland and Tasmania. At St Vincent's they trained leading surgeon Victor Chang and opened Australia's first AIDS clinic. In the 21st century, with more and more lay people involved in management, the sisters began collaborating with Sisters of Mercy Hospitals in Melbourne and Sydney. Jointly the group operates four public hospitals; seven private hospitals and 10 aged care facilities. The English Sisters of the Little Company of Mary arrived in 1885 and have since established public and private hospitals, retirement living and residential aged care, community care and comprehensive palliative care in New South Wales, the ACT, Victoria, Tasmania, South Australia and the Northern Territory. The Little Sisters of the Poor, who follow the charism of Saint Jeanne Jugan to 'offer hospitality to the needy aged' arrived in Melbourne in 1884 and now operate four aged care homes in Australia.