Dear Colegue, please I recomend to read my article on the American Hear Journal
Iosa D, DeQuattro V, Lee DD, Elkayam U, Palmero H.Am Heart J. 1989 Apr;117(4):882-7. doi: 10.1016/0002-8703(89)90627-3.PMID: 2494874
As well you may read my article on the WHO, pub 52, Chagas disease and Cardiovasclar Dysautonomia I am an expert on Cold Blood Test. With pleasure Dr Daniel Iosa, Editor International Journal of the International College of Angiology USA