20. ‘From the perspective of an invasive species, it appears to be a good idea to spread out to many different habitats simultaneously,’ said Lingchong You, associate professor of biomedical engineering at Duke. ‘If they all survive, the overall growth is much better. But there's a catch because of the Allee effect; gleam greater chance each population will fall below the critical threshold and every location will fail.’ Related StoriesResearch may give new treatments for sufferers experiencing severe diarrheaGene study reveals how a strain of E.Carefully constructing an idea with the right mixture of member responsibility. Steering workers to the consumer-directed health strategy choice by lowering the employee contribution or increasing the fund quantity. We began offering a consumer-directed health plan in June 2004 as a way to stability our desire to provide associates health advantages that they find precious with the necessity to look for a solution that could help us manage health care costs, stated Michael Plotzke, chief monetary officer at Plastipak Holdings, a plan sponsor who was part of the study. We knew that in order to achieve success with the Aetna HealthFund plan we needed to work with associates to greatly help them understand how the plans work and offer them with ongoing communications throughout the year.