1. San José de Querétaro Hospital, Clinic of Pneumology Private Practice, Querétaro, México

2. San José de Querétaro Hospital, Clinic of Cardiology/Echocardiography Private Practice, Querétaro, México

3. Monterrey Institute of Technology and Higher Education Faculty of Medicine, Monterrey, México

4. San José de Querétaro Hospital, Clinic of General Surgery/Vascular and Endovascular Surgery Private Practice, Querétaro, México