- Correspondence to Dr José Fidel Baizabal-Carvallo, Department of Internal Medicine, University of Guanajuato, 20 de Enero no. 927, León, Guanajuato, México C.P. 37320;
- Received October 24, 2016
- Revised November 29, 2016
- Accepted November 30, 2016
- First published December 16, 2016.
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