Saavalainen, Liisu
Heikinheimo, Oskari
Tiitinen, Aila
Härkki, Päivi
Funding for this research was provided by:
Helsinki University Central Hospital Research Funds (30.10.2015)
Article History
Received: 25 November 2015
Accepted: 18 May 2016
First Online: 26 May 2016
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this kind of electronic data-based study, informed consent is not required in Finland.
: This article does not contain any studies with human participants performed by any of the authors.