Korpela, Katja
Renko, Marjo
Paalanne, Niko
Vänni, Petri
Salo, Jarmo
Tejesvi, Mysore
Koivusaari, Pirjo
Pokka, Tytti
Kaukola, Tuula
Pirttilä, Anna Maria
Tapiainen, Terhi
Article History
Received: 23 September 2019
Revised: 16 December 2019
Accepted: 28 January 2020
First Online: 13 February 2020
Competing interests
: The authors declare no competing interests.
: All the parents of the children who were enrolled in the study provided their written informed consent.