Here are the lists of what I have found concerning:

Molecular Diagnostics

Ei Spotlights: Computer Medical Diagnosis and Treatment unfortunately it is uncertain if it exists anymore.

Applied Sciences Inc for Molecular Diagnostics.

General Diagnostics and Decision-making

Diagnostic and Decision-Support Systems

Computer Aided Diagnosis:

General Lists

AI systems in Routine Clinical Use

About Expert Systems in Medicine

In Austria::

An Expert System for Interpretation of Virol. Tests

About MESICAR, a decision-support system for Reumatism ++

Hepaexpert, an expertsystem for diagnosing hepatitis

Brazil

The Health Informatics Center in Sao Paolo contains decision support systems as projects which have to look into ++.

Chicago / USA

Case-Based Reasoning in Medicine, which speaks for itself.

Denmark

Stig Kjaer Andersen's Homepage, one of the co-founders of HUGIN.

The Hugin Homepage, for a KBS for the diagnosis of metabolic diseases.

KBS projects in Aalborg

England

Teesside Medical Computing Centre has some research on expert systems for detecting lower back pains.

France

University of Rennes1. contains Aide Diagnostique Medical ADM. Which is a diagnostic aid system. (unfortunately in french) check: ADM and other information systems.

The University of Rouen is a very good site.

VIRAID Clinical Algorithms for Acute Viral Hepatitis

DataBases:

To the GENATLAS a database for the Human GenomeProject.