Does registration of professionals improve the quality of travelers' health advice?

Background: The objectives of the Dutch National Coordination Center for Travelers' Health Advice (LCR) are to improve the uniformity of travelers' health advice in the Netherlands and to enhance its quality. The LCR offers national guidelines and quality criteria, as well as a telephone consultation service, where health professionals can pose questions regarding travel medicine. Since 2005, a register for qualified travel health professionals has been in place.