nowadays there are a few postgraduate orthopedic surgeons who wish to enter a spinal fellowship program. the purpose of this study is to determine the current trainees’ perceptions of competency in the spine fellowship education in mashhad university of medical sciences and evaluating their suggestion to overcome the problem. in this cross sectional study, a self-made questionnaire was develope...

Networks influence human behavior and well being, and realizing this, individuals make conscious efforts to shape their own networks. Over the past decade, economists have combined these ideas with concepts from game theory, oligopoly, general equilibrium, and information economics to develop a general framework of analysis. The ensuing research has deepened our understanding of classical quest...