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+### About Dataset
+This file describes the contents of the heart-disease directory.
+
+This directory contains 4 databases concerning heart disease diagnosis.
+All attributes are numeric-valued. The data was collected from the
+four following locations:
+
+ 1. Cleveland Clinic Foundation (cleveland.data)
+ 2. Hungarian Institute of Cardiology, Budapest (hungarian.data)
+ 3. V.A. Medical Center, Long Beach, CA (long-beach-va.data)
+ 4. University Hospital, Zurich, Switzerland (switzerland.data)
+Each database has the same instance format. While the databases have 76
+raw attributes, only 14 of them are actually used. Thus I've taken the
+liberty of making 2 copies of each database: one with all the attributes
+and 1 with the 14 attributes actually used in past experiments.
+
+The authors of the databases have requested:
+
+  ...that any publications resulting from the use of the data include the 
+  names of the principal investigator responsible for the data collection
+  at each institution.  They would be:
+
+   1. Hungarian Institute of Cardiology. Budapest: Andras Janosi, M.D.
+   2. University Hospital, Zurich, Switzerland: William Steinbrunn, M.D.
+   3. University Hospital, Basel, Switzerland: Matthias Pfisterer, M.D.
+   4. V.A. Medical Center, Long Beach and Cleveland Clinic Foundation:
+  Robert Detrano, M.D., Ph.D.
+Thanks in advance for abiding by this request.
+
+David Aha
+July 22, 1988
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