Almangush, Alhadi
Bello, Ibrahim O.
Heikkinen, Ilkka
Hagström, Jaana
Haglund, Caj
Kowalski, Luiz Paulo
Nieminen, Pentti
Coletta, Ricardo D.
Mäkitie, Antti A.
Salo, Tuula
Leivo, Ilmo
Funding for this research was provided by:
Turku University Hospital Research Fund
Helsinki University Hospital Research Fund
Finnish Cancer Society
Finnish Dental Society
Maritza and Reino Salonen Foundation
Finska Läkaresällskapet
Article History
Received: 3 April 2020
Revised: 9 September 2020
Accepted: 15 September 2020
First Online: 21 September 2020
Compliance with ethical standards
: The institutional review boards of the five Finnish university hospitals (Helsinki, Turku, Tampere, Oulu, and Kuopio) approved this research. In addition, the Brazilian Human Research Ethics Committee and the Finnish National Supervisory Authority for Welfare and Health (VALVIRA) also approved this research.
: The authors declare that they have no conflict of interest.