Ethics statement
The studies involving humans were approved by the ethics committees «Ethikkommission Nordwest- und Zentralschweiz», «Ethikkommission Ostschweiz», and “Kantonale Ethikkommission Zürich» in Switzerland, “Comissâo Nacional de Ética Em Pesquisa” (CONEP) in Brazil and “Comisión Federal Para La Protección Contra Riesgos Sanitarios” (COFEPRIS) in Mexico. The studies were conducted in accordance with the local legislation and institutional requirements. The participants provided their written informed consent to participate in this study.