A significant part of the cost of a base station in the cellular mobile radio system is the power amplifier. An electronic payment authorization associated with the request may be generated, for compensation of at least one of the intermediary and a medical record repository. The spinal fusion implants of the present invention may be relatively solid or hollow and may have surface roughenings to promote bone ingrowth and stability. The swirl generator provides smooth combustion with no instabilities and minimum total pressure losses and enables significant reductions in the LD ratio of the combustor.