Withdrawal from opioids such as oxycodone causes physical symptoms similar to the flu. Withdrawal also causes psychological symptoms whose demoralizing affects can be just as overpowering as the physical symptoms of withdrawal.
A director is a person from a group of managers who leads or supervises a particular area of a company, program, or project. Companies that use this term often have many directors spread throughout different business functions or roles (e.g. director of human resources).
Chairman - This particular role within the company is often a non executive role that also has the task of overseeing the entire business or organization. Managing Director - A managing director is employed by the business, often by the chairman. Other roles include running the business and producing salaries.