1. Federal University of Rio Grande; Faculty of Medicine; Rua Visconde Paranaguá 102 Centro Rio Grande RS Brazil 96201-900
2. Östersund County Hospital; Östersund Sweden
3. Mid Sweden University; Department of Health Sciences; Östersund Sweden SE-831 25
4. Halifax Dalhousie University, IWK Health Centre; Canadian Center for Vaccinology; 5850/5980 University Avenue Halifax NS Canada B3K 6R8