Centro Digestivo Doctores Con-Mediplaza;
Pavas 245-1200;
San José;
Costa Rica;
Department of Clinical Laboratory Medicine;
Kochi Medical School;
Kochi University;
Nankoku-city;
Kochi 783-8505;
Japan;
Department of Public Health;
Kochi Medical School;
Kochi University;
Nankoku-city;
Kochi 783-8505;
Japan;