[1] Univ La Frontera, Dept Especialidades Med, Fac Med, Francisco Salazar 01145, Temuco, Chile
[2] Hosp Dr Hernan Henriquez Aravena, Unidad Neurol, Temuco, Chile
[3] Univ La Frontera, Ctr Excelencia Capacitac Invest & Gest Salud Base, Temuco, Chile
[4] Univ La Frontera, Fac Medicina, Ctr Invest Epidemiol Cardiovasc & Nutr EPICYN, Temuco, Chile
[5] Univ Publ Navarra, Dept Ciencias Salud, Pamplona, Spain
[6] Inst Invest Sanitaria Navarra IDISNA, Pamplona, Spain
[7] Clin Univ Navarra, Med Prevent, Pamplona, Spain
[8] Univ La Frontera, Dept Salud Publ, Fac Med, Temuco, Chile