1. Laboratory medicine in primary health care: a report of a joint WHO/NORDKEM/ECLS workshop,1989
2. Effect of feedback on test ordering behaviour of general practitioners;Winkens;Br Med J,1992
3. A standard solution for the exchange of clinical laboratory data EUCLIDES;De Moor,1990
4. An emerging standard for health information systems;Schultz,1989
5. ASTM E 1238-88. Standard specification for transferring clinical laboratory data messages between independent computer systems,1988