it ^ aS ^ ?^lers' but ̂ is only since 1937 that . has come to be extensively used. However, ^nce the experience of the operation covers only ah Period of five years, any conclusions ?ut it should still be considered tentative and ossibly subj ect to revision in the light of further Perience, but enough work has been done to ve a preliminary opinion about its scope and Rations. . the extra-pleura...

This review is aimed at readers seeking an introductory overview, teaching courses and interested in visionary ideas. It first describes the range of topics covered by evolutionary medicine, which include human genetic variation, mismatches to modernity, reproductive medicine, degenerative disease, host-pathogen interactions and insights from comparisons with other species. It then discusses pr...

Work relationships between registered nurses (RNs) and practical nurses (LPNs) are changing as new models of nursing care delivery are introduced to create more flexibility for employers. In Canada, a team-based, hospital nursing care delivery model, known as Care Delivery Model Redesign (CDMR), redesigned a predominantly RN-based staffing model to a functional team consisting of fewer RNs and ...