Presented at the Irfan Colloquia Session #81, Bosch Bahá'í School, California (May 29 - June 1, 2008).
Mirrored with permission from irfancolloquia.org/81/klebel_heart2.
Documents posted between 2003-2012 had various slightly different URLs and sometimes can be found in archive.org with addresses like bahai-library.com/file.php5?file=klebel_heart_neurocardiology.