sentences:  For the next two decades Schaefer and his staff travelled the Arctic collecting medical information, administering vaccinations to remote camps, and seeing to the general health care of Inuit and First Nations groups in the Arctic.The Unit spent two months a year in the Arctic, as well as occasional emergence trips, and at the Charles Camsell Hospital analysing the data collected and seeing to patients.The conclusions of this research indicated changes to traditional life by increased influence of southern non-Native culture on lifestyle, diet, and social structure had enormous negative health effects.